CVE-2025-55204Public exploitNetwork attack vector

Remote code execution via unsanitized artist-page HTML

Published Jan 5, 2026 · Updated Jan 5, 2026

Code injection in muffon before 2.3.0 allows remote attackers to execute arbitrary files through a crafted muffon:// artist link. The artist-page renderer passes untrusted artist data to Vue's v-html directive without sanitization, while the exposed openExternalLink preload API forwards file URLs to Electron shell.openExternal. A victim must visit an attacker-controlled page or click the crafted link; muffon then launches and executes the referenced local file.

CVSS severity8.8
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in muffon before 2.3.0 allows remote attackers to execute arbitrary files through a crafted muffon:// artist link. The artist-page renderer passes untrusted artist data to Vue's v-html directive without sanitization, while the exposed openExternalLink preload API forwards file URLs to Electron shell.openExternal. A victim must visit an attacker-controlled page or click the crafted link; muffon then launches and executes the referenced local file.

The record

CVE
CVE-2025-55204
Published
Jan 5, 2026
Updated
Jan 5, 2026
Vendor
Aleksey Shpakovsky
Product
muffon
Classifications
CWE-79, CWE-94, T1203, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 2.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Aleksey Shpakovsky · muffonversion=< 2.3.0

Published CVSS scores

9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
8.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1203Exploitation for Client Execution
T1204.001Malicious Link

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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