Vulnerability · Published Jul 28, 2025 · Assigned by GitHub_M
CVE-2025-54423copyparty has a DOM-Based XSS vulnerability when displaying multimedia metadata
Medium 5.4
In plain English
A medium-severity cross-site scripting in copyparty from 9001. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.5%top 59.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | copyparty | 1.18.5 | GHSA-9q4r-x2hj-jmvr |
| PyPI | copyparty | 1.18.5 | PYSEC-2026-1277 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
References
- https://github.com/9001/copyparty/security/advisories/GHSA-9q4r-x2hj-jmvr x_refsource_CONFIRM
- https://github.com/9001/copyparty/commit/895880aeb0be0813ddf732487596633f8f9fc3a6 x_refsource_MISC
- https://github.com/9001/copyparty/releases/tag/v1.18.5 x_refsource_MISC