CVE-2021-21311
Adminer Server-Side Request Forgery Vulnerability
IN CISA KEV
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.
- Vendor
- Adminer
- Product
- Adminer
- CVSS 3.1
- 7.2 (high), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CVSS 3.1
- 7.2 (high), scored by security-advisories@github.comCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CWE
- CWE-918
- Published
- 2021-02-11
- NVD modified
- 2026-06-17
- NVD status
- Analyzed
CISA KEV
- Date added
- 2025-09-29
- Due date
- 2025-10-20
- Ransomware use
- Unknown
- 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.
EPSS
98.5% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- github.com (Patch)
- github.com (Patch, Third Party Advisory)
- lists.debian.org (Mailing List, Third Party Advisory)
- packagist.org (Product, Third Party Advisory)
- github.com (Patch)
- github.com (Patch, Third Party Advisory)
- lists.debian.org (Mailing List, Third Party Advisory)
- packagist.org (Product, Third Party Advisory)
- www.cisa.gov (US Government Resource)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.