CVE-2025-58121: Insufficient permission validation on multiple REST API endpoints in Checkmk 2.2.0, 2.3.0, and 2.4.0 before version…
CVE-2025-58121 · Severity: medium · CVSS 5.4 · Published 2025-11-18
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
No. Junglewise Threat Intelligence has no report of CVE-2025-58121 being exploited in the wild.
How severe is CVE-2025-58121?
Medium severity, with a CVSS score of 5.4, published 18 November 2025.
Which products and versions are affected?
Checkmk. The advisory does not name versions.
Is there a fix for CVE-2025-58121?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-58121?
Check whether you run Checkmk. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.