CVE-2026-8435: Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion()
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Concrete CMS 9to a version that resolves this vulnerability.Fixed in 9.5.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8435?
CVE-2026-8435 has a severity score of low with a CVSS score of 2.3.
How do I fix CVE-2026-8435?
To fix CVE-2026-8435, upgrade Concrete CMS to version 9.5.0 or later.
What type of vulnerability is CVE-2026-8435?
CVE-2026-8435 is a Cross Site Request Forgery (CSRF) vulnerability.
In which version of Concrete CMS is CVE-2026-8435 present?
CVE-2026-8435 is present in Concrete CMS versions prior to 9.5.0.
What does the risk score of CVE-2026-8435 indicate?
The risk score of CVE-2026-8435 indicates a very low probability of exploitation due to its low severity.