Servers and applications
CVE-2021-21311
Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.
Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 29 Sept 2025.
- Severity
- High 7.2
- Published
- 11 Feb 2021
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Fixed in
- 4.7.9
- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
AdminerServers and applications · cpe:a:adminer:adminer |
|
Known exploited
- CISA name
- Adminer Server-Side Request Forgery Vulnerability
- 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.
- Due for US agencies
- 20 Oct 2025
- Used in ransomware
- Not known