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Vulnerabilities CVE-2026-7882

CVE-2026-7882

Low
Open
TLP:CLEAR

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

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Description

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.

Details

CVSS Score
2.3
EPSS Score
0.12%

1.9th percentile

CVSS 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
Confidence
90%
Published
May 21, 2026
Last Modified
May 22, 2026
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