Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability
Date: 2026-03
Affected: composer/concrete5/concrete5
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-3244
CWE: CWE-79

In Concrete CMS below version 9.4.8, A stored Cross-site Scripting (XSS) vulnerability exists in the search block where page names and content are rendered without proper HTML encoding in search results. This allows authenticated, rogue administrators to inject malicious JavaScript through page names that executes when users search for and view those pages in search results. The Concrete CMS security team thanks zolpak for reporting.


Mitigations:

Architectural layers (MAESTRO):