ByteOS Network

NVD Vulnerability Details :

CVE-2026-48559

Deferred

Source-disclosure@vulncheck.com

Published At-01 Jun, 2026 | 15:16

Updated At-01 Jun, 2026 | 16:55

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	5.1	MEDIUM	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary	3.1	5.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Type: Secondary

Version: 4.0

Base score: 5.1

Base severity: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Type: Primary

Version: 3.1

Base score: 5.4

Base severity: MEDIUM

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CWE ID	Type	Source
CWE-79	Primary	disclosure@vulncheck.com

CWE ID: CWE-79

Type: Primary

Source: disclosure@vulncheck.com

References

Hyperlink	Source	Resource
https://github.com/epoupon/lms/issues/844	disclosure@vulncheck.com	N/A
https://github.com/epoupon/lms/milestone/94	disclosure@vulncheck.com	N/A
https://www.vulncheck.com/advisories/lightweight-music-server-stored-xss-via-media-file-metadata-tags	disclosure@vulncheck.com	N/A
https://www.zeroscience.mk/#/advisories/ZSL-2026-5987	disclosure@vulncheck.com	N/A