CVE-2026-28495

CRITICAL

GetSimple CMS 3.3.22 - CSRF to RCE

Title source: llm

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.

References (1)

[Vendor Advisory] https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-92wv-q2jp-qg88

Scores

CVSS v3 9.6

EPSS 0.0006

EPSS Percentile 19.6%

Attack Vector NETWORK

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

Classification

CWE

CWE-352

Status draft

Timeline

Published Mar 10, 2026

Tracked Since Mar 11, 2026