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CVE-2026-48559— Lightweight Music Server 3.76.0 Stored XSS via Media File Metadata Tags

Quick assessment

Affected
epoupon lms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lightweight Music Server是Emeric POUPON个人开发者的一个自托管音乐流媒体服务软件。 Lightweight Music Server 3.76.0及之前版本存在跨站脚本漏洞，该漏洞源于存储型跨站脚本，可能导致攻击者通过嵌入恶意HTML在媒体文件元数据标签中执行任意JavaScript。

CVSS 5.4 · Medium EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
epoupon lms ≤ 3.76.0 affected
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I. Basic Information for CVE-2026-48559

Vulnerability Information
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Vulnerability Title
Lightweight Music Server 3.76.0 Stored XSS via Media File Metadata Tags
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Lightweight Music Server 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lightweight Music Server是Emeric POUPON个人开发者的一个自托管音乐流媒体服务软件。 Lightweight Music Server 3.76.0及之前版本存在跨站脚本漏洞，该漏洞源于存储型跨站脚本，可能导致攻击者通过嵌入恶意HTML在媒体文件元数据标签中执行任意JavaScript。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
epoupon lms 0 ~ 3.76.0 -

II. Public POCs for CVE-2026-48559

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-48559

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Patches & Fixes for CVE-2026-48559 (1)

Vendor Advisories for CVE-2026-48559 (2)

Other References for CVE-2026-48559 (1)

IV. Related Vulnerabilities

Same product: lms
Same weakness: CWE-79

V. Comments for CVE-2026-48559

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