CVE-2025-39663

Published October 30th, 2025

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CVSS v3

8.4

HIGH

CVSS v2

N/A

Affected

PROJECT

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).

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