CVE-2025-65000

MEDIUM
Published Dec 18, 2025 Modified Dec 23, 2025 CWE-212

Description

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.

CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-212 CWE-212

Affected Products

Vendor Product
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk
checkmk checkmk

References

Advisories & Patches

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2025-65000? +
CVE-2025-65000 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-65000? +
CVE-2025-65000 affects products from checkmk, specifically: checkmk. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-65000? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2025-65000 — free, no signup required.

Start Free Scan