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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (51.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
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
- checkmk.com/werk/17984 (vendor-advisory, Vendor Advisory)
- github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250730-01_Checkmk_… (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.