Lyrion Music Server (formerly Logitech Media Server, and often abbreviated as "LMS" ) is open-source software which can control and serve (stream) music to a wide range of physical and virtual audio players called Squeezeboxes. Lyrion Music Server can stream your local music collection, internet radio stations, and content from many streaming services (with and without subscriptions).
The log viewer reflects request parameters and raw log content into HTML with no escaping. Template Toolkit has no global auto-escaping so any [% var %] without an explicit | html filter is an injection point. The search, lines and path query parameters are reflected directly, and log lines are emitted as raw HTML. Any attacker-provided value that gets logged (a crafted URL, User-Agent, stream title, player name) becomes stored XSS.