PT-2026-29146 · Baserproject · Basercms

Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-21861

NVD

CVSS v3.1

9.1

Critical

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

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.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-21861

Affected Products

Basercms

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-21861 · Security Note
• https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g · Note
• https://github.com/baserproject/basercms/releases/tag/5.2.3 · Note
• https://basercms.net/security/JVN_20837860 · Note