CVE-2025-58121 Insufficient permission validation on multiple REST API endpoints
Low-privileged users can perform unauthorized actions or access sensitive information via REST API endpoints in Checkmk.
- 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-2025-58121?
CVE-2025-58121 is a medium-severity missing authorization vulnerability in Checkmk Checkmk, published on 18 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Insufficient permission validation on multiple REST API endpoints in Checkmk 2.2.0, 2.3.0, and 2.4.0 before version 2.4.0p16 allows low-privileged users to perform unauthorized actions or obtain sensitive information
Weakness: CWE-280
Which versions are affected by CVE-2025-58121?
It affects 1 product.
Products include Checkmk Checkmk.
How do I fix CVE-2025-58121?
No fix has been published for CVE-2025-58121 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-58121 being exploited?
There is no known exploitation of CVE-2025-58121 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-4qrg-gphx-m2ch, UBUNTU-CVE-2025-58121.