{"id":15747,"date":"2026-11-08T14:00:26","date_gmt":"2026-11-08T13:00:26","guid":{"rendered":"https:\/\/www.bayootec.com\/?p=15747"},"modified":"2026-11-08T14:07:41","modified_gmt":"2026-11-08T13:07:41","slug":"sitefinity-upgrade-four-versions-will-reach-end-of-life-simultaneously-in-november","status":"publish","type":"post","link":"https:\/\/www.bayootec.com\/en\/blog-en\/sitefinity-upgrade-four-versions-will-reach-end-of-life-simultaneously-in-november\/","title":{"rendered":"Sitefinity Upgrade: Four versions will reach end-of-life simultaneously in November"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-right:0px;--awb-padding-bottom:15px;--awb-padding-left:0px;--awb-padding-right-medium:9%;--awb-padding-left-medium:9%;--awb-padding-right-small:0%;--awb-padding-left-small:0%;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1352px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:0%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:0%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:0%;--awb-spacing-left-medium:0%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>In November 2026, support for Sitefinity versions 15.0, 15.1, 15.2, and 15.3 will end. This information can be found in <a href=\"https:\/\/www.progress.com\/support\/sitefinity-lifecycle-policy\" target=\"_blank\" rel=\"noopener noreferrer\">Progress\u2019s Sitefinity Life Cycle Policy Guide<\/a> (as of October 29, 2026). <br \/>This post explains the applicable deadlines, the differences between \u201cActive,\u201d \u201cSunset,\u201d and \u201cRetired\u201d statuses, how the release model changes with version 15.4 LTS, and what factors influence the effort required for a version upgrade.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-padding-right-small:0px;--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:0%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:0%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:0%;--awb-spacing-left-medium:0%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Active, Sunset, Retired: What These Three Levels Mean<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-2 fusion-text-no-margin\" style=\"--awb-margin-top:-20px;--awb-margin-bottom:30px;\"><p><a href=\"https:\/\/www.progress.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Progress<\/a> uses a three-phase model:<\/p>\n<\/div><ul style=\"--awb-margin-top:-px;--awb-line-height:27.2px;--awb-icon-width:27.2px;--awb-icon-height:27.2px;--awb-icon-margin:11.2px;--awb-content-margin:38.4px;--awb-circlecolor:var(--awb-color4);--awb-circle-yes-font-size:14.08px;\" class=\"fusion-checklist fusion-checklist-1 fusion-checklist-default type-icons\"><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p><strong>&#8220;Active<\/strong> &#8221; means: The version is fully supported and receives regular product updates that include bug fixes, security patches, and compatibility updates.<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p><strong>Sunset<\/strong>  This means: Technical support will continue to be available, but only critical updates will be provided, and Progress will deliver these at its own discretion. No new features will be added, and the version will no longer be sold. The CVSS v3.1 rating illustrates how narrowly \u201ccritical\u201d is defined. Progress determines what \u201ccritical\u201d means based on the CVSS score, a scale from 0 to 10 that measures the severity of a security vulnerability. During the sunset phase, fixes are only provided for vulnerabilities with a score of 9 or higher. Vulnerabilities with a high score (7 to 8.9) or a medium score (4 to 6.9) are typically addressed by regular product updates, which are no longer provided during this phase.<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>After all, &#8220;<strong>retired<\/strong> &#8221; means there is no longer any obligation to provide updates, support is provided only on a best-effort basis, and there is expressly no commitment to provide security updates.<\/p>\n<\/div><\/li><\/ul><div class=\"fusion-text fusion-text-3\" style=\"--awb-margin-top:20px;\"><p>For a publicly accessible website, the difference between \u201cSunset\u201d and \u201cRetired\u201d is therefore anything but academic. During the Sunset phase, at least the most serious vulnerabilities are still covered; after that, there is no longer any guarantee.<\/p>\n<\/div><div class=\"fusion-image-element\" style=\"--awb-margin-bottom:20px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\" style=\"border-radius:5px;\"><a class=\"fusion-no-lightbox\" href=\"https:\/\/www.progress.com\/sitefinity-cms\" target=\"_blank\" aria-label=\"TEC_Sitefinity-Upgrade Im November_Absatz1\" rel=\"noopener noreferrer\"><img decoding=\"async\" width=\"1024\" height=\"576\" alt=\"Sitefinity-Upgrade: Lifecycle-Fristen und Ablauf eines Versionswechsels\" src=\"https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz1.jpg\" data-orig-src=\"https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz1-1024x576.jpg\" class=\"lazyload img-responsive wp-image-15737\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271366%27%20height%3D%27768%27%20viewBox%3D%270%200%201366%20768%27%3E%3Crect%20width%3D%271366%27%20height%3D%27768%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz1-800x450.jpg 800w, https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz1-1200x675.jpg 1200w, https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz1.jpg 1366w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1100px) 100vw, 1024px\" \/><\/a><\/span><\/div><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Roadmap: Which Sitefinity versions will be retired and when<\/h2><\/h2><\/div>\n<div class=\"table-2\">\n<table width=\"100%\">\n<thead>\n<tr>\n<th align=\"left\">Version<\/th>\n<th align=\"left\">Current Status<\/th>\n<th align=\"left\">Retired<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\">15.4 LTS (current)<\/td>\n<td align=\"left\">Active<\/td>\n<td align=\"left\">Open, not before January 2030<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">15.3<\/td>\n<td align=\"left\">Sunset as of April 2026<\/td>\n<td align=\"left\">November 2026<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">15.0 \/ 15.1 \/ 15.2<\/td>\n<td align=\"left\">End of support as of November 2025<\/td>\n<td align=\"left\">November 2026<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">14.4 LTS<\/td>\n<td align=\"left\">End of Support as of April 2026<\/td>\n<td align=\"left\">April 2027<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">14.0<\/td>\n<td align=\"left\">&#8211;<\/td>\n<td align=\"left\">retired since September 2024<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">14.1 \/ 14.2 \/ 14.3<\/td>\n<td align=\"left\">&#8211;<\/td>\n<td align=\"left\">retired since December 2023<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">13.3 LTS<\/td>\n<td align=\"left\">&#8211;<\/td>\n<td align=\"left\">retired since April 2026<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">13.0 \/ 13.1 \/ 13.2<\/td>\n<td align=\"left\">&#8211;<\/td>\n<td align=\"left\">Retired since December 2021<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">12.x and earlier<\/td>\n<td align=\"left\">&#8211;<\/td>\n<td align=\"left\">Retired for years<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"fusion-text fusion-text-4\" style=\"--awb-margin-top:20px;\"><p>One sentence in the policy tends to get overlooked, but it has direct consequences: \u201cReleases and versions not included in the table below should be considered retired.\u201d Anyone working on a version that no longer appears in the vendor overview doesn\u2019t even need to ask about support.<\/p>\n<p>This results in two groups with different levels of urgency. Those running versions 15.0 through 15.3 have a clear timeframe until November 2026, and the path to 15.4 LTS is technically the shortest because it remains within the same major version. On the other hand, for versions 13.x or 14.0 through 14.3, there are already no longer any guaranteed security updates. Here, it\u2019s no longer a matter of planning, but of catching up.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-3 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top:20px;--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Why \u201cit\u2019s running fine\u201d isn\u2019t a reason not to upgrade<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-5\" style=\"--awb-margin-top:-20px;\"><p>The most common objection to an upgrade is that the site is already working fine. That&#8217;s true, but it doesn&#8217;t help much, because a risk doesn&#8217;t become apparent during normal operation\u2014it only becomes evident in an emergency.<\/p>\n<p>Three points are regularly overlooked in this context. The first:<a href=\"https:\/\/www.progress.com\/sitefinity-cms\" target=\"_blank\" rel=\"noopener noreferrer\"> Sitefinity<\/a> relies on third-party components, most notably the .NET framework. Progress itself points out that support for a third-party library may end sooner than support for the Sitefinity version, and recommends upgrading in such cases. So Sitefinity\u2019s own lifecycle isn\u2019t the only clock ticking.<\/p>\n<p>Second: With retirement, additional options are no longer available. Retired versions are not supported in Sitefinity Cloud, and Progress recommends updating to a supported version before deploying to the cloud. So anyone considering a move to the cloud later on will have no choice but to upgrade anyway\u2014only with more time pressure.<\/p>\n<p>Third: The gap is growing. Upgrading across two major versions isn&#8217;t simply twice as much work as upgrading across one, because customizations, third-party modules, and dependencies have diverged further in the meantime. The longer an upgrade is put off, the bigger the project becomes.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-4 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Sitefinity 15.4 LTS: Changes to the Release Model<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-6 fusion-text-no-margin\" style=\"--awb-margin-top:-20px;--awb-margin-bottom:30px;\"><p>The move to 15.4 LTS is more than just a version upgrade; it marks a shift in Progress\u2019s release strategy. The policy states: \u201cGoing forward from version 15.4 LTS, <a href=\"https:\/\/www.progress.com\/sitefinity-cms\" target=\"_blank\" rel=\"noopener noreferrer\">Sitefinity<\/a> is transitioning to a continuous delivery model, where new functionality, improvements, and fixes are delivered incrementally through successive product updates on top of version 15.4 LTS rather than through new official releases.\u201d<\/p>\n<p>This is good news for planning. New features, security fixes, and compatibility adjustments will be delivered in the future via cumulative product updates, which, according to <span style=\"color: var(--awb-color4);\"><a href=\"https:\/\/www.progress.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Progress<\/a><\/span>, offer \u201ca predictable and controlled way to adopt new capabilities without requiring major version upgrades.\u201d In addition, LTS versions will be supported for at least four years.<\/p>\n<p>In practice, this means that the switch to 15.4 LTS is likely to be the last major version jump for quite some time. Those who make the switch now will replace recurring upgrade projects with an ongoing update process. The effort thus shifts from the project phase to operations, which is appealing to anyone with investment budgets that are difficult to plan, provided that capacity for this is also factored into operations.<\/p>\n<\/div><div class=\"fusion-image-element\" style=\"--awb-margin-bottom:20px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\" style=\"border-radius:5px;\"><a class=\"fusion-no-lightbox\" href=\"https:\/\/www.progress.com\/sitefinity-cms\" target=\"_blank\" aria-label=\"TEC_Sitefinity-Upgrade Im November_Absatz2\" rel=\"noopener noreferrer\"><img decoding=\"async\" width=\"1024\" height=\"576\" alt=\"Sitefinity-Upgrade: Lifecycle-Fristen und Ablauf eines Versionswechsels\" src=\"https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz2-1.jpg\" data-orig-src=\"https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz2-1-1024x576.jpg\" class=\"lazyload img-responsive wp-image-15759\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271366%27%20height%3D%27768%27%20viewBox%3D%270%200%201366%20768%27%3E%3Crect%20width%3D%271366%27%20height%3D%27768%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz2-1-800x450.jpg 800w, https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz2-1-1200x675.jpg 1200w, https:\/\/www.bayootec.com\/wp-content\/uploads\/sites\/2\/2026\/11\/TEC_Sitefinity-Upgrade-Im-November_Absatz2-1.jpg 1366w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1100px) 100vw, 1024px\" \/><\/a><\/span><\/div><div class=\"fusion-title title fusion-title-5 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top:20px;--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Front End for the Sitefinity Upgrade: ASP.NET Core, MVC, or Web Forms?<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-7\" style=\"--awb-margin-top:-20px;\"><p>From a technical standpoint, a version upgrade is often less complicated than expected. Things get tricky when customizations from previous years are tied to models that are no longer recommended as a base.<\/p>\n<p>For new projects, we recommend  <a href=\"https:\/\/www.progress.com\/documentation\/sitefinity-cms\/set-up-asp.net-core-renderer\" target=\"_blank\" rel=\"noopener noreferrer\">Progress&#8217;s ASP.NET Core Approach<\/a>, optionally with a front end built on Next.js. Existing MVC-based implementations will continue to run: According to  <span style=\"color: var(--awb-color4);\"><a href=\"https:\/\/www.progress.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Progress<\/a> <\/span>Supported in all supported versions, but Progress recommends an upgrade here as well. For WebForms front ends, which are still found in older installations, however, there is no longer a choice. Progress discontinued WebForms support in the front end with version 14.1; 13.3 LTS was the last officially supported version for this. Anyone using WebForms pages, templates, or widgets must convert them when upgrading to ASP.NET Core or Next.js. Migration to MVC is only possible if there are very few WebForms elements in an otherwise MVC-based project.<\/p>\n<p>That\u2019s why it\u2019s worth treating an upgrade as two separate decisions. The first concerns the version and is dictated by deadlines. The second concerns the front-end model and\u2014provided WebForms isn\u2019t involved\u2014is a genuine choice: stick with what\u2019s working, or take this opportunity to migrate templates and widgets to the recommended approach. Both approaches are valid; it should just be a conscious decision and not a byproduct that simply happens as the project progresses.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-6 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top:0px;--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Performing a Sitefinity Upgrade: How the Version Upgrade Process Works<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-8\" style=\"--awb-margin-top:-20px;\"><p><a href=\"https:\/\/www.progress.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Progress<\/a> provides tools to facilitate the process, including the <a href=\"https:\/\/www.progress.com\/documentation\/sitefinity-cms\/sitefinity-migration-analyzer\" target=\"_blank\" rel=\"noopener noreferrer\">Migration Analyzer<\/a><a href=\"https:\/\/www.progress.com\/documentation\/sitefinity-cms\/sitefinity-migration-analyzer\" target=\"_blank\" rel=\"noopener noreferrer\"> <\/a>and CLI support, as well as documented upgrade guides for each source version. This process has proven effective for us in our projects:<\/p>\n<\/div><ul style=\"--awb-margin-bottom:20px;--awb-line-height:27.2px;--awb-icon-width:27.2px;--awb-icon-height:27.2px;--awb-icon-margin:11.2px;--awb-content-margin:38.4px;--awb-circlecolor:var(--awb-color4);--awb-circle-yes-font-size:14.08px;\" class=\"fusion-checklist fusion-checklist-2 fusion-checklist-default type-icons\"><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>The first step is to <strong>take stock<\/strong>: Which version is currently running? Which third-party modules are in use? How many custom widgets and templates are there? How deeply do the customizations extend into the core? And what is the status of the integrations? This also determines the <strong>target version<\/strong>: Progress recommends updating directly to 14.4 LTS or newer even from versions that have already been retired and generally choosing the latest available version, which is currently 15.4 LTS. No mandatory intermediate steps are required for this. The effort lies in handling your own customizations and third-party modules.<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Before proceeding, it\u2019s worth developing a <strong>testing plan<\/strong>: What must be verified to work properly after the upgrade such as form workflows, search, personalization, multilingual support, or integrated legacy systems? This list will later serve as the basis for acceptance testing and will prevent discussions about whether something was already broken beforehand.<\/p>\n<\/div><\/li><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p>Next comes the <strong>upgrade in a copy of the environment<\/strong>, fine-tuning our own customizations, and testing third-party modules, which often lag behind. Finally, there\u2019s <strong>the go-live and post-launch<\/strong> monitoring, because some of the discrepancies only become apparent under real load and with real content.<\/p>\n<\/div><\/li><\/ul><div class=\"fusion-title title fusion-title-7 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>The Effort Involved in a Sitefinity Upgrade: What It Depends On<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-9\" style=\"--awb-margin-top:-20px;\"><p>It&#8217;s impossible to give a reliable figure without looking at the installation, and generalizations can be particularly misleading when it comes to upgrades. Four drivers account for almost all of the effort involved.<\/p>\n<p>The <strong>extent of customizations<\/strong> is the most significant factor: How many custom widgets, templates, and extensions are there, and to what extent do they affect the core? An installation that\u2019s close to the standard is a completely different project than one that has been extensively customized over the years.<\/p>\n<p>Then there&#8217;s the <strong>version gap<\/strong>: A jump from 15.3 to 15.4 behaves differently than one from 13.3 to 15.4.<\/p>\n<p>A third factor is <strong>third-party modules and integrations<\/strong>, because they don&#8217;t fit into our own schedule. A module without a compatible version quickly becomes a bottleneck.<\/p>\n<p>And finally, <strong>test coverage<\/strong>. When there is documentation of what needs to work, the acceptance process goes smoothly. If this foundation is missing, it is developed during the project which is time well spent, but needs to be factored into the schedule.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-8 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top:0px;--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"font-family:var(--awb-typography1-font-family);font-weight:var(--awb-typography1-font-weight);font-style:var(--awb-typography1-font-style);margin:0;\"><h2>Conclusion<\/h2><\/h2><\/div><div class=\"fusion-text fusion-text-10\" style=\"--awb-margin-top:-20px;\"><p>For some Sitefinity installations, the deadline has been set: November 2026 for versions 15.0 through 15.3 and April 2027 for 14.4 LTS. For versions 13.x and 14.0 through 14.3, the deadline has long since passed.Anyone upgrading to 15.4 LTS now will likely be making the last major version jump for quite some time, because Progress will switch to cumulative product updates afterward. Two things pay off here: making a conscious decision about the front-end model and writing the test plan before the upgrade rather than after.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--link_color: var(--awb-color4);--awb-border-color:var(--awb-color1);--awb-border-radius-top-left:10px;--awb-border-radius-top-right:10px;--awb-border-radius-bottom-right:10px;--awb-border-radius-bottom-left:10px;--awb-overflow:hidden;--awb-background-color:var(--awb-color4);--awb-flex-wrap:wrap;--awb-box-shadow: 10px 6px #e5e5e5;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1352px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-padding-top:5px;--awb-padding-right:5px;--awb-padding-bottom:5px;--awb-padding-left:5px;--awb-overflow:hidden;--awb-bg-color:var(--awb-color4);--awb-bg-color-hover:var(--awb-color4);--awb-bg-size:cover;--awb-border-color:var(--awb-color4);--awb-border-top:5px;--awb-border-right:5px;--awb-border-bottom:5px;--awb-border-left:5px;--awb-border-style:solid;--awb-border-radius:10px 10px 10px 10px;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-9 fusion-sep-none fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:var(--awb-color1);--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h3 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"margin:0;\"><h3>Sitefinity Upgrade with BAYOOTEC: Certified Partner from Darmstadt<\/h3><\/h3><\/div><div class=\"fusion-text fusion-text-11\"><p><span style=\"color: var(--awb-color1);\">We are a certified Progress Sitefinity partner and hold the following badges<\/span><em><span style=\"color: var(--awb-color1);\"> Technical Accredited Sitefinity <\/span><\/em><span style=\"color: var(--awb-color1);\">and<\/span><em><span style=\"color: var(--awb-color1);\"> Digital Agency Partner<\/span><\/em><span style=\"color: var(--awb-color1);\">. When it comes to upgrades, however, there\u2019s something else that matters: We have a background in .NET development and bring more than 25 years of experience with software and its interfaces to the table. The stumbling blocks of an upgrade rarely lie in the CMS core; more often than not, they stem from customizations and integrated systems.<\/span><\/p>\n<p><strong style=\"color: var(--awb-color1);\">Not sure which version your website is running on or how urgent the upgrade is?<\/strong><span style=\"color: var(--awb-color1);\"><br \/>\nThat\u2019s a good place to start. Get in touch with us we\u2019ll review the version, customizations, and integrations and let you know what needs to be done and by when.<\/span><\/p>\n<\/div><div ><a class=\"fusion-button button-flat fusion-button-default-size button-default fusion-button-default button-1 fusion-button-default-span fusion-button-default-type\" target=\"_self\" href=\"https:\/\/www.bayootec.com\/en\/contact-us\/\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">Contact us now<\/span><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:35px;--awb-padding-right:0px;--awb-padding-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1352px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-10 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left awb-responsive-type__disable\" style=\"margin:0;\">Frequently Asked Questions About the Sitefinity Upgrade<\/h2><\/div><div class=\"accordian fusion-accordian\" style=\"--awb-border-size:1px;--awb-icon-size:16px;--awb-content-font-size:var(--awb-typography4-font-size);--awb-icon-alignment:left;--awb-hover-color:var(--awb-color2);--awb-border-color:var(--awb-color3);--awb-background-color:var(--awb-color1);--awb-divider-color:var(--awb-color1);--awb-divider-hover-color:var(--awb-color3);--awb-icon-color:var(--awb-color1);--awb-title-color:var(--awb-color5);--awb-content-color:var(--awb-color8);--awb-icon-box-color:var(--awb-color5);--awb-toggle-hover-accent-color:var(--awb-color5);--awb-title-font-family:var(--awb-typography1-font-family);--awb-title-font-weight:var(--awb-typography1-font-weight);--awb-title-font-style:var(--awb-typography1-font-style);--awb-title-font-size:16px;--awb-content-font-family:var(--awb-typography4-font-family);--awb-content-font-weight:var(--awb-typography4-font-weight);--awb-content-font-style:var(--awb-typography4-font-style);\"><div class=\"panel-group fusion-toggle-icon-boxed\" id=\"accordion-15747-1\"><div class=\"fusion-panel panel-default panel-ab95eb4cfdb9dca5c fusion-toggle-has-divider\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_ab95eb4cfdb9dca5c\"><a aria-expanded=\"false\" aria-controls=\"ab95eb4cfdb9dca5c\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-15747-1\" data-target=\"#ab95eb4cfdb9dca5c\" href=\"#ab95eb4cfdb9dca5c\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon fa-angle-down fas\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">By when do I need to update my Sitefinity version?<\/span><\/a><\/h4><\/div><div id=\"ab95eb4cfdb9dca5c\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_ab95eb4cfdb9dca5c\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>According to the Progress Lifecycle Policy, versions 15.0 through 15.3 will be retired in November 2026, followed by 14.4 LTS in April 2027. Versions 13.x and 14.0 through 14.3 have already been retired. Anyone still running one of these older versions therefore no longer receives guaranteed security updates and should take action as soon as possible.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-673395decd3bec88b fusion-toggle-has-divider\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_673395decd3bec88b\"><a aria-expanded=\"false\" aria-controls=\"673395decd3bec88b\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-15747-1\" data-target=\"#673395decd3bec88b\" href=\"#673395decd3bec88b\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon fa-angle-down fas\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">What does &quot;retired&quot; mean?<\/span><\/a><\/h4><\/div><div id=\"673395decd3bec88b\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_673395decd3bec88b\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>Progress distinguishes between the Active, Sunset, and Retired phases. In the Retired phase, there is no longer any obligation to provide updates; support is provided only on a best-effort basis, and there is expressly no commitment to security updates. This is crucial for publicly accessible websites, as known vulnerabilities are no longer necessarily patched, and organizations must implement their own workarounds.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-f64907d76bacffcf6 fusion-toggle-has-divider\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_f64907d76bacffcf6\"><a aria-expanded=\"false\" aria-controls=\"f64907d76bacffcf6\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-15747-1\" data-target=\"#f64907d76bacffcf6\" href=\"#f64907d76bacffcf6\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon fa-angle-down fas\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">What&#039;s new in Sitefinity 15.4 LTS?<\/span><\/a><\/h4><\/div><div id=\"f64907d76bacffcf6\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_f64907d76bacffcf6\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>Starting with version 15.4 LTS, Progress is transitioning to a continuous delivery model. New features, security fixes, and compatibility updates will now be delivered via cumulative product updates rather than new major releases, and LTS versions will be supported for at least four years. This largely eliminates the need for major, recurring version jumps, shifting them to ongoing operations.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-35bfc5dfbcc73a14f fusion-toggle-has-divider\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_35bfc5dfbcc73a14f\"><a aria-expanded=\"false\" aria-controls=\"35bfc5dfbcc73a14f\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-15747-1\" data-target=\"#35bfc5dfbcc73a14f\" href=\"#35bfc5dfbcc73a14f\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon fa-angle-down fas\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">Can I skip multiple versions at once?<\/span><\/a><\/h4><\/div><div id=\"35bfc5dfbcc73a14f\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_35bfc5dfbcc73a14f\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>Generally speaking, yes. Progress recommends updating directly to 14.4 LTS or newer, even from versions that have already been retired, and advises always choosing the latest available version\u2014currently 15.4 LTS. There are no mandatory intermediate steps; the effort lies in customizations and third-party modules. The greater the version gap, the further apart they have diverged, and a jump across multiple major versions is therefore more complex than the sheer version difference would suggest.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-3a9946bb7b310537b fusion-toggle-has-divider\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_3a9946bb7b310537b\"><a aria-expanded=\"false\" aria-controls=\"3a9946bb7b310537b\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-15747-1\" data-target=\"#3a9946bb7b310537b\" href=\"#3a9946bb7b310537b\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon fa-angle-down fas\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon fa-angle-right fas\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">Do I have to switch to ASP.NET Core when upgrading?<\/span><\/a><\/h4><\/div><div id=\"3a9946bb7b310537b\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_3a9946bb7b310537b\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>This is not mandatory for MVC. Existing MVC implementations will continue to run and are supported in all supported versions; however, Progress recommends upgrading to ASP.NET Core or Next.js. The situation is different for WebForms: Progress discontinued WebForms support in the front end with version 14.1, so the front end must be migrated during the upgrade. It makes sense to address this issue proactively during the upgrade, for example, if template work is already scheduled.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":40,"featured_media":15775,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[497,501,502,503],"job-standort":[],"job-bereich":[],"job-arbeitszeit":[],"job-gmbh":[],"class_list":["post-15747","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-en","tag-progress-sitefinity","tag-sitefinity","tag-sitefinity-upgrade","tag-upgrade"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sitefinity Upgrade: Which Versions Are Being Phased Out | BAYOOTEC<\/title>\n<meta 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