PHP CVE-2026-28495
CRITICALCVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionNVD
GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.
AnalysisAI
GetSimple CMS massiveAdmin plugin has a CSRF vulnerability enabling attackers to perform admin actions through crafted malicious pages.
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RemediationAI
Within 24 hours: Audit all administrator accounts for unauthorized access and review recent configuration file modifications in audit logs. Within 7 days: Implement network segmentation to restrict admin panel access by IP, enforce multi-factor authentication for all admin accounts, and disable the massiveAdmin plugin if not operationally critical. …
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External POC / Exploit Code
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