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TI-2023-19881 Aliases CVE-2023-38501GHSA-f54q-j679-p9hh

copyparty vulnerable to reflected cross-site scripting via k304 parameter

Priority MEDIUM 61CWE-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 · Low
Fix status
Fixed

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

Summary

copyparty is file server software. Prior to version 1.8.7, the application contains a reflected cross-site scripting via URL-parameter `?k304=...` and `?setck=...`. The worst-case outcome of this is being able to move or delete existing files on the server, or upload new files, using the account of the person who clicks the malicious link. It is recommended to change the passwords of one's copyparty accounts, unless one have inspected one's logs and found no trace of attacks. Version 1.8.7 contains a patch for the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.09246 95th percentileScored 2026-11-07
Fix Fixed copyparty (9001): 1.8.7copyparty (PyPI): 1.8.7

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 1.8.71.8.7Patch availableCNA
—copyparty (PyPI)before 1.8.71.8.7Patch availableGHSA-f54q-j679-p9hh
  • copyparty Vendor9001 Affected before 1.8.7 Fixed in 1.8.7 Patch available CNA
  • copyparty (PyPI) Vendor— Affected before 1.8.7 Fixed in 1.8.7 Patch available GHSA-f54q-j679-p9hh

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:9001:copyparty:*:*:*:*:*:*:*:*before 1.8.7Vulnerable9001
  • cpe:2.3:a:9001:copyparty:*:*:*:*:*:*:*:* Versions before 1.8.7 Vulnerable ·9001

Remediation

  • Fix · CNA copyparty (9001) Fixed in 1.8.7
  • Fix · GHSA-f54q-j679-p9hh copyparty (PyPI) Fixed in 1.8.7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-38501
  2. 2026-10-03 Alias added: GHSA-f54q-j679-p9hh

References

Patch 1

Advisory 3

Other 3

  • 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-2025-34228 copyparty has a DOM-Based XSS vulnerability when displaying multimedia metadata CVSS 3.1MEDIUM 6.1
  • 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