CVE-2026-18113

Concrete CMS 9.0 through 9.5.2 is affected by a stored cross-site scripting (XSS) vulnerability in the Top Navigation Bar block . The block failed to HTML-escape dropdown child page names before rendering them into the page, allowing a user with page-creation or renaming privileges to inject a sc...

CVE-2026-18113: Improper Neutralization of Input During Web Page Generation

In Concrete CMS 9.0 to 9.5.2, the Top Navigation Bar block did not HTML-escape dropdown child page names before writing them into the page, so a user who could create or rename pages could store a script through a child page name and have it run in the browser of any visitor, editor, or...