CVE-2026-28495 | THREATINT

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.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-10 | Updated 2026-03-10 | Assigner GitHub_M

CRITICAL: 9.7CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-352: Cross-Site Request Forgery (CSRF)

Product status

<= 3.3.22

affected

References

github.com/...CMS-CE/security/advisories/GHSA-92wv-q2jp-qg88

cve.org (CVE-2026-28495)

nvd.nist.gov (CVE-2026-28495)

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