What’s Vulnerable › Vulnerabilities
CVE-2025-64996: Overly broad file permissions in the mk_inotify plugin allows reading and manipulating the plugin's output
- Severity: medium (CVSS 4.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-11-18 · updated 2026-10-19
- Weakness: CWE-732
Description
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 GmbH Checkmk: before 2.3.0; 2.3.0, 2.3.0-b1, 2.3.0-b2, 2.3.0-b3, 2.3.0-b4, 2.3.0-b5 (+63) — fixed in 2.3.0
How to fix
Upgrade to a fixed version: Checkmk GmbH Checkmk 2.3.0. Check the vendor advisory for mitigations.
References
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