CVE-2025-66562 | THREATINT

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.

PUBLISHED Reserved 2025-12-04 | Published 2025-12-05 | Updated 2025-12-05 | Assigner GitHub_M

HIGH: 8.9CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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

Product status

< 1.3.4

affected

References

github.com/...L/tuui/security/advisories/GHSA-qjhq-rgmr-6c3g

github.com/...ommit/f673fa5b4d76e8236c7d9506d0727875cfa79cc1

github.com/AI-QL/tuui/releases/tag/v1.3.4

cve.org (CVE-2025-66562)

nvd.nist.gov (CVE-2025-66562)