Vulnerability details

CVE-2025-67744

ThinkInAIXYZ deepchat

Mermaid XSS vulnerability leads to Remote Code Execution

CVSS 3.1

9.7Critical

Official description

DeepChat is an open-source artificial intelligence agent platform that unifies models, tools, and agents. Prior to version 0.5.3, a security vulnerability exists in the Mermaid diagram rendering component that allows arbitrary JavaScript execution. Due to the exposure of the Electron IPC renderer to the DOM, this Cross-Site Scripting (XSS) flaw escalates to full Remote Code Execution (RCE), allowing an attacker to execute arbitrary system commands. Two concurrent issues, unsafe Mermaid configuration and an exposed IPC interface, cause this issue. Version 0.5.3 contains a patch.

CVSS scores

Score	Version	Source	Vector
9.7Critical	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
ThinkInAIXYZ	deepchat	< 0.5.3	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/ThinkInAIXYZ/deepchat/security/advisories/GHSA-w8w8-82pv-5rg9 x_refsource_CONFIRM
https://github.com/ThinkInAIXYZ/deepchat/commit/b179d97921af04a0ae1ae68757338dd8b8cbefe7 x_refsource_MISC

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Details

Published: 2025-12-16
Last updated: 2025-12-17
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.62%

Probability of exploitation in 30 days

50.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-94
Improper Control of Generation of Code ('Code Injection')