What is CVE-2025-3506?

CVE-2025-3506 is a medium-severity vulnerability in Checkmk, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 5.3/10. Published 2025-05-08.

How severe is CVE-2025-3506?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Checkmk

CVE-2025-3506

Files to be deployed with agents are accessible without authentication in Checkmk 2.1.0, Checkmk 2.2.0, Checkmk 2.3.0 and <Checkmk 2.4.0b6 allows attacker to access files that could contain secrets.

EPSS: 0.003 (19.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Checkmk — versions 2.4.0
Checkmk Gmbh — versions 2.4.0, 2.3.0, 2.2.0

Weakness classification (CWE)

CWE-497 — Exposure of Sensitive System Information to an Unauthorized Control Sphere

References

security@checkmk.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-3506?: CVE-2025-3506 is a medium-severity vulnerability in Checkmk, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 5.3/10. Published 2025-05-08.
How severe is CVE-2025-3506?: Medium severity. CVSS v3 base score is 5.3 out of 10.