CVE-2021-47736: Cmsimple-Xh Cmsimple Xh

High severity, CVSS 7.2. EPSS: 1.1% chance of exploitation in the next 30 days.

CMSimple_XH 1.7.4 contains an authenticated remote code execution vulnerability in the content editing functionality that allows administrative users to upload malicious PHP files. Attackers with valid credentials can exploit the CSRF token mechanism to create a PHP shell file that enables arbitrary command execution on the server.

Affected products

• Cmsimple-Xh Cmsimple Xh: version 1.7.4 only

Published 2025-12-23. Last modified 2026-06-17.