VULNERABILITY INTELLIGENCE

CVE-2025-66222

CVSS score9.6 CRITICAL
EPSS probability0.61%
CISA KEVNot currently listed
Published2025-12-03
Last modified2026-10-18
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-94
  • nvd@nist.gov: CWE-79

Primary references