CVE-2021-47736 HIGH

CVE-2021-47736: CMSimple_XH 1.7.4 Authenticated Remote Code Execution via Content Editing

Vendor Cmsimple-Xh
Product CMSimple_XH
Weakness CWE-94 · Code injection
Published December 23, 2025
Last update January 5, 2026

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 23, 2025 CVE published
January 5, 2026 Record updated