What’s Vulnerable › Vulnerabilities

CVE-2025-54423: copyparty has a DOM-Based XSS vulnerability when displaying multimedia metadata

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-28 · updated 2026-06-17
• Weakness: CWE-79

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 products

• 9001 copyparty: before 1.18.5 — fixed in 1.18.5

How to fix

Upgrade to a fixed version: 9001 copyparty 1.18.5. Check the vendor advisory for mitigations.

References

• https://github.com/9001/copyparty/commit/895880aeb0be0813ddf732487596633f8f9fc3a6
• https://github.com/9001/copyparty/releases/tag/v1.18.5
• https://github.com/9001/copyparty/security/advisories/GHSA-9q4r-x2hj-jmvr

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