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CVE-2026-8421 Concrete CMS 9.5.0 and below is vulnerable to CSRF on install_package() with conditional token bypass leading to RCE

🗓️ 21 May 2026 20:25:11Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 1 Views

Concrete CMS 9.5.0 and earlier have a cross site forgery in install_package enabling remote code execution.

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08 Jul 2026 08:11Current
6.2Medium risk
Vulners AI Score6.2
CVSS 47.5
EPSS0.00171
1