CVE-2021-21311
HIGH7.2⚠ KEVEPSS 94.1%adminer - security update
Published: 2/11/2021Modified: 3/9/2026Added to CISA KEV: 9/29/2025
Description
### Impact Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. ### Patches Patched by ccd2374b, included in version [4.7.9](https://github.com/vrana/adminer/releases/tag/v4.7.9). ### Workarounds * Use a single driver version (e.g. `adminer-mysql.php`). * Protect access to Adminer also by other means, e.g. by HTTP password, IP address limiting or by OTP [plugin](https://www.adminer.org/plugins/). ### References https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf ### For more information If you have any questions or comments about this advisory: * Comment at ccd2374b.
Affected packages (3)
- Debian/adminerfrom 0, < 4.7.9-1
- Debian/adminerfrom 0, < 4.2.5-3+deb9u2
- Packagist/vrana/adminerfrom 0, < 4.7.9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:H |
References (10)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-21311
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-21311
- PATCHhttps://github.com/vrana/adminer
- WEBhttps://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
- WEBhttps://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf
- WEBhttps://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
- WEBhttps://lists.debian.org/debian-lts-announce/2021/03/msg00002.html
- WEBhttps://packagist.org/packages/vrana/adminer
- WEBhttps://sourceforge.net/p/adminer/news/2021/02/adminer-479-released
- WEBhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311