CVE-2025-39663

HighCVSS 8.4/10Last modified Oct 19, 2026

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).

Metrics

CVSS 3.1 8.4/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-80 CWE-79

Affected software

No affected versions have been published.

Timeline

Published: Oct 30, 2025
Last modified: Oct 19, 2026
NVD status: Analyzed

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