CVE-2025-65000

Medium · 5.3

CVSS

5.3

EPSS

0.2%

Published

Dec 18, 2025

CISA due date

—

The record

SSH private keys of the "Remote alert handlers (Linux)" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handlers on hosts where the handler was deployed.

Affected packages

Ecosystem	Package	Introduced	Fixed