CVE-2025-68669Public exploitNetwork attack vector

Host command execution via loose Mermaid rendering

Published Dec 23, 2025 · Updated Dec 23, 2025

Cross-site scripting in 5ire 0.15.2 and earlier allows remote attackers to execute host commands through crafted Mermaid markup. The useMarkdown.ts hook initializes markdown-it-mermaid with loose security, allowing node HTML event handlers to run JavaScript that invokes exposed electron.mcp methods. Exploitation requires attacker-controlled Markdown to be rendered in the desktop client; successful execution can register and activate an MCP server command on the host.

CVSS severity9.6
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in 5ire 0.15.2 and earlier allows remote attackers to execute host commands through crafted Mermaid markup. The useMarkdown.ts hook initializes markdown-it-mermaid with loose security, allowing node HTML event handlers to run JavaScript that invokes exposed electron.mcp methods. Exploitation requires attacker-controlled Markdown to be rendered in the desktop client; successful execution can register and activate an MCP server command on the host.

The record

CVE
CVE-2025-68669
Published
Dec 23, 2025
Updated
Dec 23, 2025
Vendor
nanbingxyz
Product
5ire
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 0.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

nanbingxyz · 5ireversion=<= 0.15.2

Published CVSS scores

9.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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