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CVE-2026-8340 Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion

🗓️ 22 May 2026 13:58:55Reported by ConcreteCMSType 
vulnrichment
 vulnrichment
🔗 github.com👁 18 Views

Concrete CMS 9.5.0 and below has CSRF in Backend File approveVersion allowing an editor to publish an attacker’s chosen version.

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22 May 2026 13:58Current
5.8Medium risk
Vulners AI Score5.8
CVSS 42.3
EPSS0.00103
SSVC
18