CVE-2025-66562

Critical

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.

SeverityCritical

CVSS9.6

Exploit probability—

ProductAiql Tuui

PublishedDec 5, 2025

First seenDec 5, 2025

Weakness typeCWE-79Cross-site scripting (XSS)CWE-94Code injection

How to fix

Update

aiql tuui1.3.4 or later

Affected products

Product	Affected versions	Fixed in
aiql tuui	v < 1.3.4	1.3.4

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