---
cve: "CVE-2026-25892"
severity: "HIGH"
cvss: 7.5
epss: "1.6%"
vendor: "vrana"
kev: false
exploited: false
published: "2026-02-09 22:16:04"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-27T22:02:22+02:00"
---

# CVE-2026-25892

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 39b339b1b551d2cc100893047fac2498a83d8407 (Commit)
- 21d3a3150388677b18647d68aec93b7850e457d3 (Commit)

## Referenzen

- <https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh>
- <https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3>
- <https://github.com/vrana/adminer/releases/tag/v5.4.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25892) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_