high7.2Known exploited
CVE-2021-21311
Adminer Server-Side Request Forgery Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2025-09-29. Federal due date: 2025-10-20.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
Adminer contains a server-side request forgery vulnerability that, when exploited, allows a remote attacker to obtain potentially sensitive information.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | vrana/adminer | < 4.7.9 | 4.7.9 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Adminer | Adminer | from 4.0.0 before 4.7.9 |
| Debian | Debian Linux | Version 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- CISA KEV catalog
- https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
- https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf
- https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
- https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html
- https://packagist.org/packages/vrana/adminer
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311
- https://github.com/advisories/GHSA-x5r2-hj5c-8jx6
- https://nvd.nist.gov/vuln/detail/CVE-2021-21311
- https://sourceforge.net/p/adminer/news/2021/02/adminer-479-released