Vulnerability Details CVE-2025-39663
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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.6%
CVSS Severity
CVSS v3 Score 8.4
References
- https://checkmk.com/werk/17998
- https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9a850f4e/2025/SBA-ADV-20250729-01_Checkmk_Cross_Site_Scripting
- http://seclists.org/fulldisclosure/2025/Nov/0
- https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9a850f4e/2025/SBA-ADV-20250729-01_Checkmk_Cross_Site_Scripting
Products affected by CVE-2025-39663
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cpe:2.3:a:checkmk:checkmk:2.0.0
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cpe:2.3:a:checkmk:checkmk:2.1.0
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cpe:2.3:a:checkmk:checkmk:2.2.0
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cpe:2.3:a:checkmk:checkmk:2.3.0
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cpe:2.3:a:checkmk:checkmk:2.4.0