CVE-2025-58444
highpriority · track · 0EPSS 0.007 · 52 %ileEUUSEPSS · scored 2026-10-26
The MCP inspector is a developer tool for testing and debugging MCP servers. A cross-site scripting issue was reported in versions of the MCP Inspector local development tool prior to 0.16.6 when connecting to untrusted remote MCP servers with a malicious redirect URI. This could be leveraged to interact directly with the inspector proxy to trigger arbitrary command execution. Users are advised to update to 0.16.6 to resolve this issue.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.6
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-g9hg-qhmf-q45mMCP Inspector is Vulnerable to Potential Command Execution via XSS When Connecting to an Untrusted MCP Server2025-09-08ghsa · osvUS
An XSS flaw exists in the MCP Inspector local development tool when it renders a redirect URL returned by a remote MCP server. If the Inspector connects to an untrusted server, a crafted redirect can inject script into the Inspector context and, via the built-in proxy, be leveraged to trigger arbitrary command execution on the developer machine. Version 0.16.6 hardens URL handling/validation and prevents script execution. > Thank you to the following researchers for their reports and contributions: > * Raymond (Veria Labs) > * Gavin Zhong, <superboyzjc@gmail.com> & Shuyang Wang, <swang@obsidiansecurity.com>.
also known as (3)
Other names and identifiers for this entity.
sources
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references (8)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2025-58444cnnvd
- https://github.com/modelcontextprotocol/inspector/commit/650f3090d26344a672026b737d81586595bb1f60cnnvd
- https://github.com/modelcontextprotocol/inspector/releasesPatchcnnvd
- https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-g9hg-qhmf-q45mcnnvd
- https://github.com/modelcontextprotocol/inspector/commit/650f3090d26344a672026b737d81586595bb1f60enisa_euvd
- https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-g9hg-qhmf-q45menisa_euvd
- https://github.com/modelcontextprotocol/inspector/commit/650f3090d26344a672026b737d81586595bb1f60nvd
- https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-g9hg-qhmf-q45mnvd
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