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CVE-2021-21311

Known Exploited (CISA KEV)HIGH

7.2

CVSS Severity Score

EPSS Score54.1920%

EPSS Percentile86.13th

PublishedFeb 11, 2021

Last ModifiedOct 24, 2025

Vulnerability Description

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.

Affected Platforms (CPE)

📦

Adminer

Adminer

>= 4.0.0 and < 4.7.9

💻

Debian

Debian Linux

= 9.0

References & Advisories

🔗 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://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

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