Critical severity9.6NVD Advisory· Published Dec 3, 2025· Updated Jun 17, 2026
CVE-2025-66222
CVE-2025-66222
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.
AI Insight
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Affected products
3<=0.5.0+ 1 more
- (no CPE)range: <=0.5.0
- (no CPE)range: < 0.5.0
Patches
Vulnerability mechanics
References
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