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CVE

CVE-2025-58444

The MCP inspector is a developer tool for testing and debugging MCP servers. A cross-site scripting issue was reported i

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.

EPSS 0.00048
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-84Improper Neutralization of Encoded URI Schemes in a Web Page
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm @modelcontextprotocol/inspector HIGH fixed in 0.16.6
▣

Scoring & Timeline

Published to NVD08 Sep 2025 · 10:15 PM
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/modelcontextprotocol/inspector/commit/650f3090d26344a672026b737d81586595bb1f60
https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-g9hg-qhmf-q45m
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