openEQUELLA before 2026.1.0 contains an authenticated stored server-side template injection vulnerability in FreemarkerPortletRenderer.renderHtml() that allows any authenticated non-guest user to achieve remote code execution by storing a malicious FreeMarker payload through a POST request to the RemotePortletService invoker endpoint. The markup field from stored portlet configuration is passed directly to custFactory.createResult() without a TemplateClassResolver restriction or FreeMarker sandboxing in BasicConfiguration, leaving built-ins such as ?new and freemarker.template.utility.Execute available, causing the payload to execute in the application server process context when any user renders a dashboard containing the affected portlet.
Fix
Patch, vendor advisory and mitigation references on NVD 1
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.6 · openequellaNVD modified 2026-10-29 12:27
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 5
- https://blog.evan.lat/posts/openeq technical-description, exploit
- https://github.com/openequella/openEQUELLA/commit/d6e165afc986f8a3ed912cdb367d5ad8c1eeab5c patch
- https://github.com/openequella/openEQUELLA/releases/tag/2026.1.0 release-notes
- https://github.com/openequella/openEQUELLA/security/advisories/GHSA-62g6-mmp6-9wv2 vendor-advisory
- https://www.vulncheck.com/advisories/openequella-authenticated-stored-ssti-via-freemarkerportletrenderer third-party-advisory