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CVE-2025-66562

9.6 · CRITICAL

TUUI is a desktop MCP client designed as a tool unitary utility integration.

Published Dec 5, 2025CWE-79EPSS 0.52%

Overview

CVE-2025-66562 is a critical-severity vulnerability. It was published on December 5, 2025 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/AI-QL/tuui/commit/f673fa5b4d76e8236c7d9506d0727875cfa79cc1GitHubgithub.com/AI-QL/tuui/releases/tag/v1.3.4GitHubgithub.com/AI-QL/tuui/security/advisories/GHSA-qjhq-rgmr-6c3g

How CyberStrike helps

Frequently asked questions

What is CVE-2025-66562?

CVE-2025-66562 is a critical-severity vulnerability. It was published on December 5, 2025 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2025-66562?

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-66562?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-66562?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-66562 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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