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

05 Dec 2025, 15:37

Type	Values Removed	Values Added
CWE		CWE-79
First Time		Thinkinai deepchat Thinkinai
CPE		cpe:2.3:a:thinkinai:deepchat::::::::
References	~~() https://github.com/ThinkInAIXYZ/deepchat/commit/371ca7b42e3685aee6e3f0c61e85277ed1ff4db7 -~~	() https://github.com/ThinkInAIXYZ/deepchat/commit/371ca7b42e3685aee6e3f0c61e85277ed1ff4db7 - Patch
References	~~() https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-v8v5-c872-mf8r -~~	() https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-v8v5-c872-mf8r - Exploit, Vendor Advisory

03 Dec 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-03 19:15

Updated : 2025-12-05 15:37

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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