Vulnerability Description
Cross-Site Scripting (XSS) vulnerability in Checkmk's distributed monitoring allows a compromised remote site to inject malicious HTML code into service outputs in the central site. Affecting Checkmk before 2.4.0p14, 2.3.0p39, 2.2.0 and 2.1.0 (eol).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Checkmk | Checkmk | >= 2.0.0, < 2.3.0 |
Related Weaknesses (CWE)
References
- https://checkmk.com/werk/17998Vendor Advisory
- https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9ExploitThird Party Advisory
- http://seclists.org/fulldisclosure/2025/Nov/0ExploitMailing ListThird Party Advisory
- https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9ExploitThird Party Advisory
FAQ
What is CVE-2025-39663?
CVE-2025-39663 is a vulnerability with a CVSS score of 8.4 (HIGH). Cross-Site Scripting (XSS) vulnerability in Checkmk's distributed monitoring allows a compromised remote site to inject malicious HTML code into service outputs in the central site. Affecting Checkmk ...
How severe is CVE-2025-39663?
CVE-2025-39663 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-39663?
Check the references section above for vendor advisories and patch information. Affected products include: Checkmk Checkmk.