CVE-2025-39664
MEDIUMCVSS 6.5/10EPSS 0.63%
Last modified
CVE-2025-39664 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.63% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Checkmk | Checkmk | >= 2.1.0, < 2.2.0 | — |
| Checkmk | Checkmk | 2.2.0 | P1 |
| Checkmk | Checkmk | 2.3.0 | — |
| Checkmk | Checkmk | 2.4.0 | — |
References
- https://checkmk.com/werk/17984Vendor Advisory
- https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250730-01_Checkmk_Path_TraversalExploit, Third Party Advisory
- https://seclists.org/fulldisclosure/2025/Oct/7Exploit, Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is 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.
How severe is CVE-2025-39664?
CVE-2025-39664 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.
How do I fix CVE-2025-39664?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2025-39664?
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Scan your code nowSource: NVD / NIST