CVE-2025-64996: Checkmk

Medium severity, CVSS 4.4. EPSS: 0.1% chance of exploitation in the next 30 days.

In Checkmk versions prior to 2.4.0p16, 2.3.0p41, and all versions of 2.2.0 and older, the mk_inotify plugin creates world-readable and writable files, allowing any local user on the system to read the plugin's output and manipulate it, potentially leading to unauthorized access to or modification of monitoring data.

Affected products

• Checkmk Checkmk: before 2.3.0 (fixed in 2.3.0); version 2.3.0 only; version 2.4.0 only

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