Concrete CMS Cross-Site Request Forgery Vulnerability in File Favorite Management

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 management controller's method for removing favorite folders, which lacks proper CSRF token validation. This vulnerability allows an attacker to trick an authenticated user into performing actions without their consent, potentially leading to unauthorized changes in the user's file preferences.

Impact

Exploitation of this vulnerability allows for Cross-Site Request Forgery, where an attacker can manipulate an authenticated user's actions, in this case, related to file favorite management.

Remediation

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

Added: May 21, 2026, 10:21 PM
Updated: May 21, 2026, 10:51 PM

Vulnerability Rating

Custom Algorithm
spread
3.4
impact
0.6
exploitability
6.5
remediation
7.7
relevance
8.6
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.