🛡️ CVE-2025-39663
🟠 CVSS 8.4 — High ⚠️ Exploit Public CWE-80 NVD
8.4
CVSS Score
0 Low4 Medium7 High9 Critical10

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).

Details

Severity HIGH
CVSS Score 8.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
CWE CWE-80
Public Exploit ⚠️ Yes
Source NVD
Published 2025-10-30
Updated 2026-06-02
Modified 2025-12-03
Fix URL N/A

Affected Packages

Software From version Fixed in
checkmk

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