CVE-2025-54423: 9001 Copyparty

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

copyparty is a portable file server. In versions up to and including versions 1.18.4, an unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files. This is fixed in version 1.18.5.

Affected products

• 9001 Copyparty: before 1.18.5 (fixed in 1.18.5)

Published 2025-07-28. Last modified 2026-06-17.