Silverstripe CMS Third-Party Maintenance & Support

Third-party support keeps Silverstripe CMS software covered — including releases past their vendor end-of-life dates. Our 24/7 engineers manage issues, remediate vulnerabilities, and help you maintain compliance, independent of the vendor contract.

Products and platforms from Silverstripe CMS

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Silverstripe CMS EOSL Dates

• Silverstripe CMS 6.1EOSL: Oct 18, 2026
• Silverstripe CMS 6.0EOSL: Apr 14, 2026
• Silverstripe CMS 6.2EOSL: Apr 30, 2027
• Silverstripe CMS 5.4EOSL: Apr 30, 2027
• Silverstripe CMS 5.3EOSL: Oct 11, 2025
• Silverstripe CMS 4.13EOSL: Jun 10, 2025
• Silverstripe CMS 5.2EOSL: May 5, 2025
• Silverstripe CMS 5.1EOSL: Oct 17, 2024

All Silverstripe CMS Models

• Silverstripe CMS 2.3
• Silverstripe CMS 2.4 (EOSL: Mar 31, 2015)
• Silverstripe CMS 3.0 (EOSL: Oct 12, 2015)
• Silverstripe CMS 3.1 (EOSL: Dec 31, 2016)
• Silverstripe CMS 3.7 (EOSL: Sep 30, 2021)
• Silverstripe CMS 4.10 (EOSL: Dec 31, 2022)
• Silverstripe CMS 4.11 (EOSL: May 19, 2023)
• Silverstripe CMS 4.12 (EOSL: Oct 26, 2023)
• Silverstripe CMS 4.13 (EOSL: Jun 10, 2025)
• Silverstripe CMS 5.0 (EOSL: Apr 17, 2024)
• Silverstripe CMS 5.1 (EOSL: Oct 17, 2024)
• Silverstripe CMS 5.2 (EOSL: May 5, 2025)
• Silverstripe CMS 5.3 (EOSL: Oct 11, 2025)
• Silverstripe CMS 5.4 (EOSL: Apr 30, 2027)
• Silverstripe CMS 6.0 (EOSL: Apr 14, 2026)
• Silverstripe CMS 6.1 (EOSL: Oct 18, 2026)
• Silverstripe CMS 6.2 (EOSL: Apr 30, 2027)