September 29, 2025 · Applied Cybernetics Group
CVE-2021-21311 — Adminer Adminer
Adminer Server-Side Request Forgery Vulnerability
- Added to KEV
2025-09-29- Federal due date
2025-10-20- Vendor
- Adminer
- Product
- Adminer
- EPSS
- 99.9th percentile (score 0.941, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-21311
CISA short description
Adminer contains a server-side request forgery vulnerability that, when exploited, allows a remote attacker to obtain potentially sensitive information.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.