CVE-2025-66562

Name: CVE-2025-66562
Creator: NVD / NIST
Published: 2025-12-05T18:15:59.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.9/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2025-66562 is a high-severity vulnerability rated 8.9/10 on the CVSS scale. 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. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS 4.0

8.9/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.43%

34.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Aiql	Tuui	< 1.3.4

References

https://github.com/AI-QL/tuui/commit/f673fa5b4d76e8236c7d9506d0727875cfa79cc1Patch
https://github.com/AI-QL/tuui/releases/tag/v1.3.4Product, Release Notes
https://github.com/AI-QL/tuui/security/advisories/GHSA-qjhq-rgmr-6c3gPatch, Vendor Advisory

Timeline

Published: Dec 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66562?

How severe is CVE-2025-66562?

CVE-2025-66562 has a CVSS score of 8.9/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66562?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66562?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST