CVE-2026-18117

Concrete CMS 9.0.0 through 9.5.3 contains a stored XSS vulnerability in the custom page alias name (customAliasName) field. The root cause is that the Edit Alias dialog applied only trim() to the submitted value without performing input neutralization. An authenticated user with canWrite (editor)...

CVE-2026-18117 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Stored XSS in Custom Page Alias Name

Concrete CMS 9.0.0 through 9.5.3 is vulnerable to stored XSS via the custom page alias name customAliasName because the Edit Alias dialog applied only trim to the submitted value and performed no input neutralization. An authenticated user holding canWrite editor permission on a page could store ...