CVE•Published 2026-01-05•Modified 2026-10-07•1 article on news•6 live references•NVD data

CVE-2025-55204Muffon · Muffon

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 48% of all CVEs

Weaknesses (CWE)

CWE-94Improper Control of Generation of Code ('Code Injection')CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Description

muffon is a cross-platform music streaming client for desktop. Versions prior to 2.3.0 have a one-click Remote Code Execution (RCE) vulnerability in. An attacker can exploit this issue by embedding a specially crafted `muffon://` link on any website they control. When a victim visits the site or clicks the link, the browser triggers Muffon’s custom URL handler, causing the application to launch and process the URL. This leads to RCE on the victim's machine without further interaction. Version 2.3.0 patches the issue.

Timeline

Published 2026-01-05

Modified 2026-10-07

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2025-55204

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Muffon Muffon"

All exposed Muffon Muffon instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Muffon"

HTTP body or banner mentions "Muffon" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2025-55204