Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-21311

CVE-2021-21311HIGH

vrana adminer — SSRF in adminer

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  C  L  L  N    7.2   .9846   99.9   YES

AFFECTED
  Product  Versions             Fixed
  adminer  >= 4.0.0, < 4.7.9 –  —

TIMELINE
  Dec 22  Reserved by GitHub_M
  Feb 11  Published (CNA: GitHub_M)
  Sep 29  Added to CISA KEV, remediation due 2025-10-20

CWE-918 · CNA: GitHub_M · CVSS v3.1 · 6 references · KEV due October 20, 2025

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
December 22, 2020	Reserved	Reserved by GitHub_M
February 11, 2021	Published	Published (CNA: GitHub_M)
September 29, 2025	KEV ADDED	Added to CISA KEV, remediation due 2025-10-20

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
vrana	adminer	—	>= 4.0.0, < 4.7.9	—

Weaknesses

CWE-918

References (6)

https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351 [x_refsource_MISC]
https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf [x_refsource_MISC]
https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6 [x_refsource_CONFIRM]
https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html [mailing-list, x_refsource_MLIST]
https://packagist.org/packages/vrana/adminer [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311 [government-resource]

Authoritative record: CVE-2021-21311 at cve.org

Vendors: vrana

Weaknesses: CWE-918

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-21311 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.