ThinkInAIXYZ deepchat up to 0.4.x Model Context Protocol Server code injection

Summaryinfo

A vulnerability identified as critical has been detected in ThinkInAIXYZ deepchat up to 0.4.x. The impacted element is an unknown function of the component Model Context Protocol Server Handler. This manipulation causes code injection. This vulnerability is handled as CVE-2025-66222. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in ThinkInAIXYZ deepchat up to 0.4.x. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component Model Context Protocol Server Handler. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-66222 since 11/25/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 0.5.0 eliminates this vulnerability. Applying the patch 371ca7b42e3685aee6e3f0c61e85277ed1ff4db7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Chat Software

Vendor

• ThinkInAIXYZ

Name

• deepchat

Version

• 0.1
• 0.2
• 0.3
• 0.4

License

• open-source

Website

• Product: https://github.com/ThinkInAIXYZ/deepchat/

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