CVE-2026-8416: Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file addFavoriteFolder($id)
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file addFavoriteFolder($id). 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 CMSto a version that resolves this vulnerability.Fixed in 9.5.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8416?
CVE-2026-8416 has a low severity score of 2.3 according to the CVSS v.4.0.
What type of vulnerability is CVE-2026-8416?
CVE-2026-8416 is a Cross Site Request Forgery (CSRF) vulnerability in Concrete CMS 9.
How do I fix CVE-2026-8416?
To mitigate CVE-2026-8416, upgrade Concrete CMS to version 9.5.0 or later.
In which version of Concrete CMS is CVE-2026-8416 present?
CVE-2026-8416 affects Concrete CMS versions before 9.5.0.
What component of Concrete CMS is affected by CVE-2026-8416?
CVE-2026-8416 affects the addFavoriteFolder function in the backend file controller of Concrete CMS.