copyparty Reflected XSS via Filter Parameter
Summary
Unauthorized reflected Cross-Site-Scripting when accessing the URL for recent uploads with the filter parameter containing JavaScript code.
Details
When accessing the recent uploads page at /?ru, users can filter the results using an input field at the top. This field appends a filter parameter to the URL, which reflects its value directly into a <script> block without proper escaping.
This vulnerability allows for reflected Cross-Site Scripting (XSS) and can be exploited against both authenticated and unauthenticated users, enabling unwanted actions in the victims browser.
PoC
A URL like this will execute alert(1):
https://127.0.0.1:3923/?ru&filter=</script><script>alert(1)</script>Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | copyparty | < 1.18.7 | 1.18.7 |
References
- https://github.com/9001/copyparty/security/advisories/GHSA-8mx2-rjh8-q3jq
- https://nvd.nist.gov/vuln/detail/CVE-2025-54589
- https://github.com/9001/copyparty/commit/a8705e611d05eeb22be5d3d7d9ab5c020fe54c62
- https://github.com/9001/copyparty
- https://github.com/9001/copyparty/releases/tag/v1.18.7
- https://pypi.org/project/copyparty
- https://github.com/advisories/GHSA-8mx2-rjh8-q3jq
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-79- Platform
- Python (PyPI)
- Package
copyparty- Disclosed
- 31.07.2025
- Updated
- 11.10.2026 13:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1276 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-8mx2-rjh8-q3jq - CC BY 4.0
Vulnerability history: copyparty
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 14
- First → latest
- 07.2023 08.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 8
- Low 3
Disclosures per year
- 2023: 3
- 2024: 0
- 2025: 6
- 2026: 5
-
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