CVE-2025-66406 — MEDIUM (5.0)

Vulnerability Description

Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.

CVSS Score

5.0

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

HIGH

Related Weaknesses (CWE)

CWE-863

References

https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hp

FAQ

What is CVE-2025-66406?

CVE-2025-66406 is a vulnerability with a CVSS score of 5.0 (MEDIUM). Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affec...

How severe is CVE-2025-66406?

CVE-2025-66406 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-66406?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.