Critical severity9.6NVD Advisory· Published Mar 10, 2026· Updated Jun 17, 2026
CVE-2026-28495
CVE-2026-28495
Description
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.
Affected products
3cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:community:*:*:*+ 1 more
- cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:community:*:*:*range: <=3.3.22
- (no CPE)range: =6.0.3
- Range: <= 3.3.22
Patches
Vulnerability mechanics
References
1- github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-92wv-q2jp-qg88nvdExploitVendor Advisory
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