CVE-2025-66562

TUUI vulnerable to Remote Code Execution (RCE) via XSS in Markdown ECharts Rendering

Published Dec 5, 2025 CVSS 4.0 · 8.9 High EPSS < 1% KEV · Not listed
Description
TUUI is a desktop MCP client designed as a tool unitary utility integration. Prior to 1.3.4, a critical Remote Code Execution (RCE) vulnerability exists in Tuui due to an unsafe Cross-Site Scripting (XSS) flaw in the Markdown rendering component. Tuui allows the execution of arbitrary JavaScript within ECharts code blocks. Combined with an exposed IPC interface that allows spawning processes, an attacker can execute arbitrary system commands on the victim's machine simply by having them view a malicious Markdown message. This vulnerability is fixed in 1.3.4.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Aiql
Aiql tuui
CPEs cpe:2.3:a:aiql:tuui:*:*:*:*:*:*:*:*
Vendors & Products Aiql
Aiql tuui
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

Type Values Removed Values Added
First Time appeared Ai-ql
Ai-ql tuui
Vendors & Products Ai-ql
Ai-ql tuui
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description TUUI is a desktop MCP client designed as a tool unitary utility integration. Prior to 1.3.4, a critical Remote Code Execution (RCE) vulnerability exists in Tuui due to an unsafe Cross-Site Scripting (XSS) flaw in the Markdown rendering component. Tuui allows the execution of arbitrary JavaScript within ECharts code blocks. Combined with an exposed IPC interface that allows spawning processes, an attacker can execute arbitrary system commands on the victim's machine simply by having them view a malicious Markdown message. This vulnerability is fixed in 1.3.4.
Title TUUI vulnerable to Remote Code Execution (RCE) via XSS in Markdown ECharts Rendering
Weaknesses CWE-79
CWE-94
References
Metrics cvssV4_0

{'score': 8.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Dec 5, 2025, 6:29 PM
Reserved
Dec 4, 2025, 4:05 PM
Status
Analyzed
Published
Dec 5, 2025, 6:15 PM
Modified
Sep 25, 2026, 11:10 PM