CVE-2025-66481

🚨 CRITICAL

DeepChat is an open-source AI chat platform that supports cloud models and LLMs. Versions 0.5.1 and below are vulnerable to XSS attacks through improperly sanitized Mermaid content. The recent securit...

Published
Dec 09, 2025
Last Modified
Dec 11, 2025
Views
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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 vulnerable to XSS attacks through improperly sanitized Mermaid content. The recent security patch for MermaidArtifact.vue is insufficient and can be bypassed using unquoted HTML attributes combined with HTML entity encoding. Remote Code Execution is possible on the victim's machine via the electron.ipcRenderer interface, bypassing the regex filter intended to strip dangerous attributes. There is no fix at time of publication.

Affected Products (1)

thinkinai - deepchat

Version: *

CVSS Scores

CVSS 3.1 9.6
9.6
CRITICAL
CVSS 2.0 9.6

Additional Information

Source
security-advisories@github.com
State
Analyzed

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