CVE-2026-48559: Epoupon Lms

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Lightweight Music Server (LMS) though 3.76.0 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary JavaScript by embedding malicious HTML in media file metadata tags such as GENRE, ARTIST, or ALBUM. Attackers can introduce a crafted media file into the victim's library, causing the payload to be saved during library scanning and executed automatically in the web interface due to tag content being rendered using Wt::TextFormat::UnsafeXHTML without sanitization in src/lms/ui/Utils.cpp.

Affected products

• Epoupon Lms: up to and including 3.76.0

Published 2026-06-01. Last modified 2026-07-22.