Medium severity · published Nov 18, 2025
CVE-2025-58121
Insufficient permission validation on multiple REST API endpoints
5.4
CVSS
0.2%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
Checkmk · Checkmk GmbH
2.4.0 before 2.4.0p16; 2.3.0; 2.2.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-58121
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-58121
Vendor Advisory
https://checkmk.com/werk/18983
More from Checkmk
8.8
CVE-2026-24096
Insufficient permission validation on multiple REST API Quick Setup endpoints
8.6
CVE-2026-14452
Open redirect and XSS via reset_url parameter
8.4
CVE-2025-39663
Cross Site Scripting through compromised remote site
7.8
CVE-2024-47091
Privilege escalation via mk_mysql agent plugin on Windows
7.8
CVE-2025-32919
Privilege Escalation in Windows License plugin for Checkmk Windows Agent