---
cve: "CVE-2025-9611"
severity: "HIGH"
cvss: 7.2
epss: "88%"
vendor: "Microsoft"
kev: false
exploited: false
published: "2026-01-07 04:24:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T10:57:37+02:00"
---

# CVE-2025-9611

> 7.2 HIGH · 🧪 PoC

## Beschreibung

Microsoft Playwright MCP Server versions prior to 0.0.40 fails to validate the Origin header on incoming connections. This allows an attacker to perform a DNS rebinding attack via a victim’s web browser and send unauthorized requests to a locally running MCP server, resulting in unintended invocation of MCP tool endpoints.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:L/SI:L/SA:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 1313fbd (Commit)

## Referenzen

- <https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3>
- <https://github.com/microsoft/playwright/commit/1313fbd>
- <https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-9611) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_