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Concrete CMS Cross-Site Request Forgery Vulnerability in File Controller

Vulnerability

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in Concrete CMS versions 9 prior to 9.5.0. The issue resides in the file controller's 'star()' method, which lacks proper CSRF token validation. This vulnerability allows an attacker to manipulate an authenticated user's actions without their consent.

Impact

Exploitation of this vulnerability could lead to unauthorized actions being performed on behalf of the user, potentially causing changes to user data or application state.

Remediation

Users can upgrade to Concrete CMS version 9.5.0 or later, where this vulnerability has been fixed.

Added: May 21, 2026, 10:20 PM
Updated: May 21, 2026, 10:53 PM

Vulnerability Rating

Custom Algorithm
spread
3.4
impact
0.6
exploitability
6.4
remediation
7.7
relevance
8.8
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.