Server-Side Request Forgery (SSRF) Affecting adminer package, versions <4.2.1-1ubuntu1+esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
88.34% (100th percentile)

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  • Snyk IDSNYK-UBUNTU1604-ADMINER-1124866
  • published1 Jun 2025
  • disclosed11 Feb 2021

Introduced: 11 Feb 2021

CVE-2021-21311  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 adminer to version 4.2.1-1ubuntu1+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream adminer package and not the adminer package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1