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TI-2025-34228 Aliases CVE-2025-54423GHSA-9q4r-x2hj-jmvr

copyparty has a DOM-Based XSS vulnerability when displaying multimedia metadata

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00472 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed copyparty (9001): 1.18.5copyparty (PyPI): 1.18.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
9001copypartybefore 1.18.51.18.5Patch availableCNA
—copyparty (PyPI)before 1.18.51.18.5Patch availableGHSA-9q4r-x2hj-jmvr
  • copyparty Vendor9001 Affected before 1.18.5 Fixed in 1.18.5 Patch available CNA
  • copyparty (PyPI) Vendor— Affected before 1.18.5 Fixed in 1.18.5 Patch available GHSA-9q4r-x2hj-jmvr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:9001:copyparty:*:*:*:*:*:*:*:*before 1.18.5Vulnerable9001
  • cpe:2.3:a:9001:copyparty:*:*:*:*:*:*:*:* Versions before 1.18.5 Vulnerable ·9001

Remediation

  • Fix · CNA copyparty (9001) Fixed in 1.18.5
  • Fix · GHSA-9q4r-x2hj-jmvr copyparty (PyPI) Fixed in 1.18.5 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-54423
  2. 2026-10-03 Alias added: GHSA-9q4r-x2hj-jmvr

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2025-34551 Copyparty is vulnerable to Regex Denial of Service (ReDoS) attacks through "Recent Uploads" page CVSS 3.1HIGH 7.5
  • TI-2023-19082 Path traversal in copyparty CVSS 3.1HIGH 7.5
  • TI-2023-21990 Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to… CVSS 3.1HIGH 7.8
  • TI-2023-19881 copyparty vulnerable to reflected cross-site scripting via k304 parameter CVSS 3.1MEDIUM 6.3
  • TI-2025-20002 copyparty renders unsanitized filenames as HTML when user uploads empty files CVSS 3.1MEDIUM 6.1
  • TI-2025-34360 copyparty Reflected XSS via Filter Parameter CVSS 3.1MEDIUM 6.3
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences