CVE-2026-30877

CRITICAL 9.1

baserCMS: OS Command Injection in the baserCMS Update Functionality

CVSS Score

9.1

EPSS Score

0.1%

EPSS Percentile

35th

baserCMS is a website development framework. Prior to version 5.2.3, there is an OS command injection vulnerability in the update functionality. Due to this issue, an authenticated user with administrator privileges in baserCMS can execute arbitrary OS commands on the server with the privileges of the user account running baserCMS. This issue has been patched in version 5.2.3.

CWE	CWE-78
Vendor	baserproject
Product	basercms
Published	Mar 31, 2026
Last Updated	Apr 2, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

baserproject / basercms

< 5.2.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/baserproject/basercms/security/advisories/GHSA-m9g7-rgfc-jcm7 basercms.net: https://basercms.net/security/JVN_20837860 github.com: https://github.com/baserproject/basercms/releases/tag/5.2.3