# CVE-2025-66222: DeepChat is a smart assistant uses artificial intelligence. In 0.5.0 and earlier, there is a Stored Cross-Site…

Source: https://junglewise.ai/threats/cve-2025-66222-deepchat-is-a-smart-assistant-uses-artificial-intelligence-in-0-5  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-03  
License: CC BY 4.0 with a link back

CVE-2025-66222 · Severity: critical · CVSS 9.6 · Published 2025-12-03

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.

Technologies: [Thinkinai Deepchat](https://junglewise.ai/threats/technologies/thinkinai-deepchat). Vendors: [Thinkinai](https://junglewise.ai/threats/vendors/thinkinai).

## Quick answers

**Is CVE-2025-66222 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-66222 being exploited in the wild.

**How severe is CVE-2025-66222?** Critical severity, with a CVSS score of 9.6, published 3 December 2025.

**Which products and versions are affected?** Thinkinai Deepchat. The advisory does not name versions.

**Is there a fix for CVE-2025-66222?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-66222?** Check whether you run Thinkinai Deepchat. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Thinkinai Deepchat

## Related threats

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- [DeepChat is an open-source AI chat platform that supports cloud models and LLMs. Versions 0.5.1 and below are…](https://junglewise.ai/threats/cve-2025-66481-deepchat-is-an-open-source-ai-chat-platform-that-supports-cloud)