Path Traversal in Checkmk
CVE-2025-39664
Insufficient escaping in the report scheduler within Checkmk <2.4.0p13, <2.3.0p38, <2.2.0p46 and 2.1.0 (EOL) allows authenticated attackers to define the storage location of report file pairs beyond their intended root directory.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.006 (47.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Checkmk — versions 2.2.0, 2.3.0, 2.4.0
- Checkmk Gmbh — versions 2.4.0, 2.3.0, 2.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@checkmk.com (vendor-advisory, Vendor Advisory)
- security@checkmk.com (Exploit, Third Party Advisory, third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-39664?
- CVE-2025-39664 is a medium-severity vulnerability in Checkmk, classified under Path Traversal. CVSS score: 6.5/10. Published 2025-10-09.
- How severe is CVE-2025-39664?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-39664 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.