CVE-2025-66222

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.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/ThinkInAIXYZ/deepchat/commit/371ca7b42e3685aee6e3f0c61e85277ed1ff4db7	Patch
https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-v8v5-c872-mf8r	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:thinkinai:deepchat:*:*:*:*:*:*:*:*

History

18 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) DeepChat es un asistente inteligente que utiliza inteligencia artificial. En la versión 0.5.0 y anteriores, existe una vulnerabilidad de Cross-Site Scripting (XSS) Almacenado en el renderizador de diagramas Mermaid que permite a un atacante ejecutar JavaScript arbitrario dentro del contexto de la aplicación. Aprovechando el puente IPC de Electron expuesto, este XSS puede escalarse a Ejecución Remota de Código (RCE) mediante el registro y el inicio de un servidor MCP (Model Context Protocol) malicioso.

Information

Published : 2025-12-03 19:15

Updated : 2026-10-18 17:10

NVD link : CVE-2025-66222

Mitre link : CVE-2025-66222

CVE.ORG link : CVE-2025-66222

JSON object : View

Products Affected

thinkinai

deepchat

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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