CVE-2026-21861

baserCMS: OS Command Injection Leading to Remote Code Execution (RCE)

Published Mar 31, 2026 CVSS 3.1 · 9.1 Critical EPSS 2.3% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qxmc-6f24-g86g baserCMS has OS Command Injection Leading to Remote Code Execution (RCE)
History
Type Values Removed Values Added
First Time appeared Baserproject
Baserproject basercms
Vendors & Products Baserproject
Baserproject basercms
Type Values Removed Values Added
First Time appeared Basercms
Basercms basercms
CPEs cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*
Vendors & Products Basercms
Basercms basercms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title baserCMS: OS Command Injection Leading to Remote Code Execution (RCE)
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 31, 2026, 2:01 PM
Reserved
Jan 5, 2026, 4:44 PM
Status
Analyzed
Published
Mar 31, 2026, 1:16 AM
Modified
Jun 17, 2026, 10:19 AM