CVE-2026-28495: critical vulnerability in GetSimpleCMS-CE
GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php
Published
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.7epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected products
GetSimpleCMS-CE · GetSimpleCMS-CERelated CVEs — GetSimpleCMS-CE
In the same product, most dangerous first.
CVE-2025-48492HIGHGetSimple CMS RCE in Edit componentEPSS 1.0%CVE-2026-27202HIGHGetSimple CMS: Uploaded Files (feature) Arbitrary File Read VulnerabilityEPSS 0.6%CVE-2026-53952CRITICALGetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic FlawEPSS 0.6%CVE-2026-56660CRITICALGetSimple CMS: CSRF, SSRF, and Unrestricted Zip ExtractionEPSS 0.5%CVE-2026-27161HIGHUnauthenticated Information Disclosure via .htaccess Reliance in Sensitive DirectoriesEPSS 0.5%CVE-2026-53953CRITICALGetSimple CMS: Predictable Password Reset Password Allows Administrator Account TakeoverEPSS 0.4%