CVE-2025-66562 HIGH

CVE-2025-66562: TUUI vulnerable to Remote Code Execution (RCE) via XSS in Markdown ECharts Rendering

Vendor Ai-Ql
Product tuui
Weakness CWE-79 · XSS
Published December 5, 2025
Last update December 5, 2025
View on NVD All CVEs

CVSS base score

8.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 5, 2025 CVE published
December 5, 2025 Record updated