---
cve: "CVE-2021-21311"
severity: "HIGH"
cvss: 7.2
epss: "98.5%"
vendor: "vrana"
kev: true
exploited: true
published: "2021-02-11 21:15:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T05:53:44+02:00"
---

# CVE-2021-21311

> 7.2 HIGH · ⚠️ CISA KEV (364 Tage) · 🔓 Exploited · 🧪 PoC

## Beschreibung

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.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA KEV seit: **29.09.2025**
- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **active**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 93c7fb248ca008e3247eb3a43812e1096e7b262c (Commit)
- ccd2374b0b12bd547417bf0dacdf153826c83351 (Commit)

## Referenzen

- <https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6>
- <https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf>
- <https://packagist.org/packages/vrana/adminer>
- <https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351>
- <https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-21311) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_