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Critical · 9.1 CVE-2026-21861 EUVD-2026-17255GHSA-qxmc-6f24-g86g

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

Published Mar 31, 2026 · Updated Mar 31, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
baserproject basercms < 5.2.3 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist baserproject/basercms < 5.2.3 5.2.3 GHSA-qxmc-6f24-g86g

References