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.
References
| Link | Resource |
|---|---|
| https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes | Release Notes |
Configurations
History
23 Jul 2026, 16:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
|
26 May 2026, 14:56
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes - Release Notes | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.3 |
| First Time |
Concretecms concrete Cms
Concretecms |
|
| CPE | cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* |
21 May 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-21 22:16
Updated : 2026-07-23 16:10
NVD link : CVE-2026-7882
Mitre link : CVE-2026-7882
CVE.ORG link : CVE-2026-7882
JSON object : View
Products Affected
concretecms
- concrete_cms
CWE
CWE-352
Cross-Site Request Forgery (CSRF)