CVE-2026-7882CWE-352

Concrete CMS 9.5.0 and below is vulnerable to CSRF via the DeleteFile controller

Low · published May 21, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
5.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
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
EPSS
0.00167 · 5.7th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-05-21T21:17Z
EPSS history
Timeline
  • 21 MAY 21:17Z
    Concrete CMS 9.5.0 and below is vulnerable to CSRF via the DeleteFile controller
    cvelistv5