Remote Code Execution in 5ire via insecure markdown-it-mermaid plugin

Publication date: 2025-12-23

Last updated on: 2026-02-06

Assigner: GitHub, Inc.

Description

5ire is a cross-platform desktop artificial intelligence assistant and model context protocol client. In versions 0.15.2 and prior, an RCE vulnerability exists in useMarkdown.ts, where the markdown-it-mermaid plugin is initialized with securityLevel: 'loose'. This configuration explicitly permits the rendering of HTML tags within Mermaid diagram nodes. This issue has not been patched at time of publication.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-12-23

Last Modified

2026-02-06

Generated

2026-07-06

AI Q&A

2025-12-24

EPSS Evaluated

2026-07-05

NVD

CVE-2025-68669

Affected Vendors & Products

Vendor	Product	Version / Range
5ire	5ire	0.15.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability exists in 5ire versions 0.15.2 and prior, where the markdown-it-mermaid plugin is configured with securityLevel set to 'loose'. This setting allows HTML tags to be rendered within Mermaid diagram nodes, which can lead to remote code execution (RCE).

Impact Analysis

An attacker could exploit this vulnerability to execute arbitrary code remotely on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the system.

Hi! I’m here to help you understand CVE-2025-68669. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70