VULNERABILITY INTELLIGENCE

CVE-2021-47735

CVSS score8.8 HIGH
EPSS probability0.88%
CISA KEVNot currently listed
Published2025-12-23
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

CMSimple 5.4 contains an authenticated remote code execution vulnerability that allows logged-in attackers to inject malicious PHP code into template files. Attackers can exploit the template editing functionality by crafting a reverse shell payload and saving it through the template editing endpoint with a valid CSRF token.

Weakness classification

  • disclosure@vulncheck.com: CWE-94

Primary references