CVE-2026-7882 — Concrete CMS 9.5.0 and below is vulnerable to CSRF via the DeleteFile controller

Description (CNA)

Concrete CMS 9.5.0 and below is vulnerable to unauthorized file deletion due to an Inverted CSRF token check in the DeleteFile controller. The code throws an error when the token IS valid and proceeds with file deletion when the token is invalid or missing. This effectively disables CSRF protection for the file deletion endpoint, allowing cross-site request forgery attacks against users who have permission to edit conversation messages. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with a vector of CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Tristan Mandani for reporting.

Affected (CNA)

Vendor / product	Versions
Concrete CMS / Concrete CMS	affected 5.0 through 9.5.0

CWE

CWE-352

References

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.