Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6
- https://github.com/microsoft/playwright/commit/1313fbd
- https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebindi
FAQ
What is CVE-2025-9611?
CVE-2025-9611 is a documented vulnerability. 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 brows...
How severe is CVE-2025-9611?
CVSS scoring is not yet available for CVE-2025-9611. Check NVD for updates.
Is there a patch for CVE-2025-9611?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.