Vulnerability-Lookup

GHSA-M7JJ-HW4M-MC77

Vulnerability from github – Published: 2026-06-01 15:30 – Updated: 2026-06-01 15:30

Details

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.

Severity

5.4 (Medium)


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

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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-48559"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-01T15:16:37Z",
    "severity": "MODERATE"
  },
  "details": "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\u0027s 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.",
  "id": "GHSA-m7jj-hw4m-mc77",
  "modified": "2026-06-01T15:30:42Z",
  "published": "2026-06-01T15:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48559"
    },
    {
      "type": "WEB",
      "url": "https://github.com/epoupon/lms/issues/844"
    },
    {
      "type": "WEB",
      "url": "https://github.com/epoupon/lms/milestone/94"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/lightweight-music-server-stored-xss-via-media-file-metadata-tags"
    },
    {
      "type": "WEB",
      "url": "https://www.zeroscience.mk/#/advisories/ZSL-2026-5987"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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": "CVSS_V4"
    }
  ]
}

CVE-2026-48559 (GCVE-0-2026-48559)

Vulnerability from cvelistv5 – Published: 2026-06-01 13:15 – Updated: 2026-07-28 01:49 X_Open Source

Title

Lightweight Music Server 3.76.0 Stored XSS via Media File Metadata Tags

Summary

Severity

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

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-01 19:27 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://www.zeroscience.mk/#/advisories/ZSL-2026-5987	technical-descriptionexploit
https://github.com/epoupon/lms/issues/844	issue-tracking
https://github.com/epoupon/lms/milestone/94
https://www.vulncheck.com/advisories/lightweight-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
epoupon	lms	Affected: 0 , ≤ 3.76.0 (semver) cpe:2.3:a:lms:lms::::::::

Date Public

2026-05-31 00:00

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab

Show details on NVD website

JSON

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  "containers": {
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                "id": "CVE-2026-48559",
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                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-01T19:27:02.521218Z",
                "version": "2.0.3"
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          "dateUpdated": "2026-06-01T19:27:14.775Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "defaultStatus": "affected",
          "packageURL": "pkg:github/epoupon/lms",
          "product": "lms",
          "repo": "https://github.com/epoupon/lms",
          "vendor": "epoupon",
          "versions": [
            {
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-M7JJ-HW4M-MC77

CVE-2026-48559 (GCVE-0-2026-48559)

Tags

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Related by attack behaviour