CVE-2025-65000 Exposure of SSH Private Keys in Remote Alert Handlers (Linux) Rule
Attackers can view SSH private keys in the web interface, potentially allowing unauthorized execution of alert handlers on monitored hosts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-65000?
CVE-2025-65000 is a low-severity vulnerability in Checkmk Checkmk, published on 18 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-212
Which versions are affected by CVE-2025-65000?
It affects 1 product.
Products include Checkmk Checkmk.
How do I fix CVE-2025-65000?
No fix has been published for CVE-2025-65000 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-65000 being exploited?
There is no known exploitation of CVE-2025-65000 in the wild and no public exploit code.
Other vulnerabilities in Checkmk Checkmk
- CVE-2025-39666 omd: Local privilege escalation when executing omd commands as root
- CVE-2024-8606 Fix 2FA bypass via RestAPI
- CVE-2022-46836 PHP code injection in watolib
- CVE-2025-32919 Privilege Escalation in Windows License plugin for Checkmk Windows Agent
- CVE-2024-28827 Privilege escalation in Windows agent
Sources
Also known as GHSA-5393-2v6g-pgwc, UBUNTU-CVE-2025-65000.