CVE-2025-58121: Checkmk

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Insufficient permission validation on multiple REST API endpoints in Checkmk 2.2.0, 2.3.0, and 2.4.0 before version 2.4.0p16 allows low-privileged users to perform unauthorized actions or obtain sensitive information

Affected products

• Checkmk Checkmk: from 2.2.0, before 2.4.0 (fixed in 2.4.0); version 2.4.0 only

Published 2025-11-18. Last modified 2026-06-17.