Critical 9.1Published Mar 30, 2026

CVE-2026-30877baserCMS: OS Command Injection in the baserCMS Update Functionality

Updated under an hour ago (Oct 27, 2026, 2:50 AM ET)

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It affects baserproject basercms and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for baserproject basercms

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

baserproject basercms baserproject:basercms (from the name)	before 5.2.3	CNA record
basercms basercms basercms:basercms	before 5.2.3	NVD

References

References

https://github.com/baserproject/basercms/security/advisories/GHSA-m9g7-rgfc-jcm7	x-refsource-confirm, vendor-advisory
https://basercms.net/security/JVN_20837860	x-refsource-misc, vendor-advisory
https://github.com/baserproject/basercms/releases/tag/5.2.3	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.