Auth bypass in Smallstep Step-ca
CVE-2025-44005
An attacker can bypass authorization checks and force a Step CA ACME or SCEP provisioner to create certificates without completing certain protocol authorization checks.
Vulnerability class: Broken Authentication
EPSS: 0.033 (86.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
Affected products
- Smallstep Step-ca — versions 0.28.4, v0.28.3
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-44005?
- CVE-2025-44005 is a critical-severity vulnerability in Smallstep Step-ca, classified under Improper Authentication. CVSS score: 10.0/10. Published 2025-12-17.
- How severe is CVE-2025-44005?
- Critical severity. CVSS v3 base score is 10.0 out of 10.