CVE-2026-48559CWE-79

Lightweight Music Server 3.76.0 Stored XSS via Media File Metadata Tags

Medium · published June 1, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
21.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00298 · 21.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-01T13:15Z
EPSS history
Timeline
  • 01 JUN 13:15Z
    Lightweight Music Server 3.76.0 Stored XSS via Media File Metadata Tags
    cvelistv5