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    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.

    Published:Dec 3, 2025
    Last Modified:Dec 5, 2025
    EPS:Dec 3, 2025
    EPSS Score:0.00153
    CVSS Score:9.7

    Affected Products

    Vendor
    Thinkinai
    Product
    Deepchat

    Exploits

    https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-v8v5-c872-mf8r

    Related CVEs

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    CVE-2025-67744 (CVSS 9.6) — DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prio…
    CVE-2025-66481 (CVSS 9.6) — DeepChat is an open-source AI chat platform that supports cloud models and LLMs. Versions 0.5.1 and below are …
    CVE-2025-58768 (CVSS 9.6) — DeepChat is a smart assistant uses artificial intelligence. Prior to version 0.3.5, in the Mermaid chart rende…
    CVE-2025-55733 (CVSS 9.6) — DeepChat is a smart assistant that connects powerful AI to your personal world. DeepChat before 0.3.1 has a o…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High