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CVE-2026-21861

CRITICAL

9.1

Description

baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execute arbitrary OS commands on the server due to improper handling of user-controlled input that is directly passed to exec() without sufficient validation or escaping. This issue has been patched in version 5.2.3.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published3/31/2026

Last Modified4/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

basercms:basercms

Weaknesses (CWE)

CWE-78

References

https://basercms.net/security/JVN_20837860(security-advisories@github.com)

https://github.com/baserproject/basercms/releases/tag/5.2.3(security-advisories@github.com)

https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g(security-advisories@github.com)

https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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