CVE-2026-21861

9.1 CRITICAL
Published: March 31, 2026 Modified: April 01, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://basercms.net/security/JVN_20837860
Source: security-advisories@github.com
Vendor Advisory
https://github.com/baserproject/basercms/releases/tag/5.2.3
Source: security-advisories@github.com
Release Notes
https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g
Source: security-advisories@github.com
Exploit Vendor Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.1 / 10.0
EPSS (Exploit Probability)
0.4%
59th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

basercms