CVE-2025-67744 CRITICAL

CVE-2025-67744: Mermaid XSS vulnerability leads to Remote Code Execution

Vendor Thinkinaixyz
Product deepchat
Weakness CWE-94 · Code injection
Published December 16, 2025
Last update December 16, 2025

CVSS base score

9.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prior to version 0.5.3, a security vulnerability exists in the Mermaid diagram rendering component that allows arbitrary JavaScript execution. Due to the exposure of the Electron IPC renderer to the DOM, this Cross-Site Scripting (XSS) flaw escalates to full Remote Code Execution (RCE), allowing an attacker to execute arbitrary system commands. Two concurrent issues, unsafe Mermaid configuration and an exposed IPC interface, cause this issue. Version 0.5.3 contains a patch.

Key dates

02Disclosure timeline

December 16, 2025 CVE published
December 16, 2025 Record updated