Vulnerability in Checkmk
CVE-2025-39666
Local privilege escalation in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows a site user to escalate their privileges to root, by manipulating files in the site context that are processed when the `omd` administrative command is run by root.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (1.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Checkmk — versions 2.2.0, 2.3.0, 2.4.0
- Checkmk Gmbh — versions 2.2.0, 2.3.0, 2.4.0
Weakness classification (CWE)
References
- checkmk.com/werk/18891 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-39666?
- CVE-2025-39666 is a high-severity vulnerability in Checkmk, classified under Untrusted Search Path. CVSS score: 7.3/10. Published 2026-04-07.
- How severe is CVE-2025-39666?
- High severity. CVSS v3 base score is 7.3 out of 10.