CVE-2025-39664

Name: CVE-2025-39664
Creator: NVD / NIST
Published: 2025-10-09T15:16:06.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2025-39664 is a high-severity vulnerability rated 7.1/10 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

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

7.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.63%

45.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

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
http://seclists.org/fulldisclosure/2025/Oct/7Exploit, Mailing List, Third Party Advisory

Timeline

Published: Oct 9, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-39664?

How severe is CVE-2025-39664?

CVE-2025-39664 has a CVSS score of 7.1/10 (HIGH 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.

Are you affected by CVE-2025-39664?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST