DeepChat’s Mermaid rendering has XSS leading to RCE_CVE-2025-58768

9.7 / 10

CRITICAL

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

Description

DeepChat is a smart assistant uses artificial intelligence. Prior to version 0.3.5, in the Mermaid chart rendering component, there is a risky operation of directly using `innerHTML` to set user content. Therefore, any malicious content rendered via Mermaid will directly trigger the exploit chain, leading to command execution. This vulnerability is primarily caused by a failure to fully address the existing XSS issue in the project, leading to another exploit chain. The exploit chain is consistent with the report GHSA-hqr4-4gfc-5p2j, executing arbitrary JavaScript code via XSS and arbitrary commands via exposed IPC. Version 0.3.5 contains an updated fix.

Basic Information

ID CVE-2025-58768

Source GitHub_M

Published Sep 9, 2025 at 20:19

Modified Sep 9, 2025 at 20:31

Affected Product

Vendor ThinkInAIXYZ

Product deepchat

Version < 0.3.5

Affected Versions ThinkInAIXYZ deepchat < 0.3.5

CWE Classification

CWE-94

References

github.com /ThinkInAIXYZ/deepchat/security/advisories/GHSA-f7q5-vc93-wp6j

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