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CVE

CVE-2025-44005

Step CA Has Authorization Bypass in ACME and SCEP Provisioners
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CVE

CVE-2025-44005

Step CA Has Authorization Bypass in ACME and SCEP Provisioners

Summary

A security fix is now available for Step CA that resolves a vulnerability affecting deployments configured with ACME and/or SCEP provisioners.

All operators running these provisioners should upgrade to the latest release (v0.29.0) immediately.

The issue was discovered and disclosed by a research team during a security review. There is no evidence of active exploitation.

To limit exploitation risk during a coordinated disclosure window, we are withholding detailed technical information for now. A full write-up will be published in several weeks.

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Embargo List

If your organization runs Step CA in production and would like advance, embargoed notification of future security updates, visit https://u.step.sm/disclosure to request inclusion on our embargo list.

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Acknowledgements

This issue was identified and reported by Stephen Kubik of the Cisco Advanced Security Initiatives Group (ASIG)

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Stay safe, and thank you for helping us keep the ecosystem secure.

Package Versions Affected

Package Version
patch Availability
No items found.

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Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Related Resources

No items found.

References

https://github.com/smallstep/certificates/security/advisories/GHSA-h8cp-697h-8c8p, https://github.com/smallstep/certificates/commit/1011f5f5408b470a636f583bf74c0d7bbaf75d72, https://github.com/smallstep/certificates

Severity

10

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
10
EPSS Probability
0.00023%
EPSS Percentile
0.05453%
Introduced Version
0,v0.18.3-rc1,v0.0.0-20220311042101-616490a9c6b8,v0.0.0-20220310043741-afb5d362061c,v0.15.16-rc7,v0.0.0-20210703020517-9fdef647099d,v0.0.0-20210526225804-48c86716a0a5,v0.13.0,v0.0.0-20190913224833-e3826dd1c33f,v0.10.0,v0.0.0-20190410205035-ab4d569f3638,v0.0.1-rc.1,v0.0.0-20181005214836-c284a2c0ab1c
Fix Available
0.29.0,v0.29.0,v0.0.0-20251203005444-1011f5f5408b

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