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CVE-2026-21861 - Vulnerability Analysis

CriticalCVSS: 9.1

Last Updated: March 31, 2026

baserCMS - Command Injection

Published: March 31, 2026Updated: March 31, 2026Remote Exploitable

Overview

baserCMS < 5.2.3 contains an OS command injection caused by improper validation of user input in core update functionality, letting authenticated administrators execute arbitrary OS commands on the server.

Severity & Score

Severity: Critical

CVSS Score: 9.1

Impact

Authenticated administrators can execute arbitrary OS commands, potentially leading to full server compromise.

Mitigation

Update to version 5.2.3 or later.

References

https://basercms.net/security/JVN_20837860
https://github.com/baserproject/basercms/releases/tag/5.2.3
https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-21861
Severity: Critical
CVSS Score: 9.1
Type: command_injection
Status: new

CWE

CWE-78

CVSS Metrics

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