# CVE-2025-65000: SSH private keys of the "Remote alert handlers (Linux)" rule were exposed in the rule page's HTML source in Checkmk <=…

Source: https://junglewise.ai/threats/cve-2025-65000-ssh-private-keys-of-the-remote-alert-handlers-linux-rule-were  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-18  
License: CC BY 4.0 with a link back

CVE-2025-65000 · Severity: medium · CVSS 5.3 · Published 2025-12-18

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.

Technologies: [Checkmk](https://junglewise.ai/threats/technologies/checkmk). Vendors: [Checkmk](https://junglewise.ai/threats/vendors/checkmk).

## Quick answers

**Is CVE-2025-65000 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-65000 being exploited in the wild.

**How severe is CVE-2025-65000?** Medium severity, with a CVSS score of 5.3, published 18 December 2025.

**Which products and versions are affected?** Checkmk. The advisory does not name versions.

**Is there a fix for CVE-2025-65000?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-65000?** Check whether you run Checkmk. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Checkmk

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