What is CVE-2025-65000?

CVE-2025-65000 is a medium-severity vulnerability in Checkmk, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 5.3/10. Published 2025-12-18.

How severe is CVE-2025-65000?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Checkmk

CVE-2025-65000

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.

EPSS: 0.002 (8.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Checkmk — versions 2.2.0, 2.3.0, 2.4.0
Checkmk Gmbh — versions 2.4.0, 2.3.0

Weakness classification (CWE)

CWE-212 — Improper Removal of Sensitive Information Before Storage or Transfer

References

security@checkmk.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-65000?: CVE-2025-65000 is a medium-severity vulnerability in Checkmk, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 5.3/10. Published 2025-12-18.
How severe is CVE-2025-65000?: Medium severity. CVSS v3 base score is 5.3 out of 10.