VDB
CVE-2025-66406
CVE-2025-66406
PUBLISHED
CVSS 5 MEDIUM
Improper Authorization Check for SSH Certificate Revocation
Reported by github_m · Published December 3, 2025
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| caddy | Wolfi | 2.10.2-r6 |
Risk scores
CVSS 3.1
5
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| smallstep | certificates | < 0.29.0 |
| wolfi | caddy | 0 |
| chainguard | caddy-fips | 0 |
| chainguard | caddy | 0 |
| smallstep | certificates | 0 |
| github.com | smallstep/certificates | 0 |
| alpine | step-certificates | 0 |
Timeline
- Dec 3, 2025 CVE Published
- Dec 3, 2025 CVE Updated
- Dec 4, 2025 EPSS Score (30 in total, the first dated here)
- Mar 17, 2026 Security Advisory
- Mar 26, 2026 Coalition ESS Score (2 in total, the first dated here)
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2025-66406
vulnetix vdb fixes CVE-2025-66406Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-66406/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart