cvedb.io
CVE-2025-66222
CRITICAL · CVSS 9.6
EPSS exploitation probability: 0%
Published 2025-12-03T19:15:58.237 · Last modified 2026-06-17T09:56:30.377

Summary

DeepChat is a smart assistant uses artificial intelligence. In 0.5.0 and earlier, there is a Stored Cross-Site Scripting (XSS) vulnerability in the Mermaid diagram renderer allows an attacker to execute arbitrary JavaScript within the application context. By leveraging the exposed Electron IPC bridge, this XSS can be escalated to Remote Code Execution (RCE) by registering and starting a malicious MCP (Model Context Protocol) server.

Affected products

thinkinai — deepchat

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.