Vulnerability in Microsoft Playwright
CVE-2025-9611
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.
Published · last modified .
EPSS exploit prediction
EPSS: 0.012 (68.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000
Affected products
- Microsoft Playwright — versions 0
Weakness classification (CWE)
References
- github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3 (vendor-advisory, technical-description, exploit)
- github.com/microsoft/playwright/commit/1313fbd (patch)
- www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-… (third-party-advisory)