Dashboard / CVE-2025-9611

CVE-2025-9611

HIGH
MEDIUM Priority: 0.09 BB Relevance: 65/100
Published: 2026-01-07 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Passive
AT: None
VC: Low
VI: Low
VA: High

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
Microsoft Playwright 0 < 0.0.40

References & Advisories (3)

Bug Bounty Relevance

65 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

7.2 / 10.0 v4.0
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

EPSS — Exploitation Probability

1.22%
Raw Score 0.012220
Percentile 69.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.01222
2026-11-12
0.01222
2026-11-10
0.01222
2026-11-09
0.01222
2026-11-08
0.01222

Intelligence Sources

mitre ref →

External Links