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Lyrion Music Server 9.2.0 (search.*) Multiple Script Insertions

High
Advisory ID
ZSL-2026-5993
Release Date
05 June 2026
Vendor
LMS Community - https://www.lyrion.org
Affected Version
9.2.0
Tested On
Windows 10 (64-bit) - EN, Lyrion Music Server (9.2.0 - 1779973211), Perl/5.32.1, SQLite
Summary

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).

Description

Advanced-search parameters (search.*) are stuffed back into the page so the form keeps its values. Most fields apply | html, but several free-text fields do not, resulting in reflected XSS.

Proof of Concept
Disclosure Timeline
27.05.2026Vulnerability discovered.
28.05.2026Contact with the vendor.
28.05.2026Vendor responds asking more details.
31.05.2026Sent details to the vendor.
31.05.2026Vendor is working on fixes and hardening security defaults.
02.06.2026Replied to the vendor.
05.06.2026Public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
05.06.2026Initial release