muffon has One-click Remote Code Execution via XSS and Custom URL Handling
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution, Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-94 and CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| staniel359 | muffon | before 2.3.0 | 2.3.0 | Patch available | CNA |
- muffon Vendorstaniel359 Affected before 2.3.0 Fixed in 2.3.0 Patch available CNA
Remediation
- Fix · CNA muffon (staniel359) Fixed in 2.3.0
Timeline
- 2026-10-02 Threatist record created from CVE-2025-55204
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences