CVE-2026-8435CWE-1275CWE-352

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion()

Low · published May 21, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
5.6
In the wild
Unconfirmed
What it is

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with 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. Thanks Yonatan Drori (Tenzai) 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 · 5.6th percentile
Weaknesses
CWE-1275 · Sensitive Cookie with Improper SameSite Attribute; CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-05-21T21:22Z
EPSS history
Timeline
  • 21 MAY 21:22Z
    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion()
    cvelistv5