CVE-2021-47735

HIGH

8.8

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.

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published12/23/2025

Last Modified12/31/2025

Sourcenvd

Honeypot Sightings0

Affected Products

cmsimple:cmsimple

Weaknesses (CWE)

CWE-94

References

https://www.cmsimple.org/(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/50356(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/cmsimple-authenticated-remote-code-execution-via-template-editing(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.