CVE-2025-39663

Published: Oct 30, 2025

Modified: Nov 7, 2025

PUBLISHED

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).

Vendor	Product	Versions
Checkmk GmbH	Checkmk	affected `2.4.0 - < 2.4.0p14` affected `2.3.0 - < 2.3.0p39` affected `2.2.0` affected `2.1.0`

Weaknesses (CWE)

CWE-80

References

https://checkmk.com/werk/17998

https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9a850f4e/2025/SBA-ADV-20250729-01_Checkmk_Cross_Site_Scripting

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CVE-2025-39663

Description

Affected Products

Weaknesses (CWE)

References