CVE-2025-54589: copyparty XSS — Exploit & Fix

Description

Copyparty is a portable file server. In versions 1.18.6 and below, 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, allowing for reflected Cross-Site Scripting (XSS) and can be exploited against both authenticated and unauthenticated users. This is fixed in version 1.18.7.

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

CWE-80 CWE-80

Affected Products

Vendor	Product	Versions
9001	copyparty	< 1.18.7

References

Advisories & Patches

https://github.com/9001/copyparty/commit/a8705e611d05eeb22be5d3d7d9ab5c020fe54c62 https://github.com/9001/copyparty/security/advisories/GHSA-8mx2-rjh8-q3jq

Exploits

https://github.com/9001/copyparty/security/advisories/GHSA-8mx2-rjh8-q3jq

Other References

https://github.com/9001/copyparty/releases/tag/v1.18.7

Frequently Asked Questions

What is CVE-2025-54589? +

Copyparty is a portable file server. In versions 1.18.6 and below, 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, allowing for reflected Cross-Site Scripting (XSS) and can be exploited against both authenticated and unauthenticated users. This is fixed in version 1.18.7. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2025-54589? +

CVE-2025-54589 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-54589? +

CVE-2025-54589 affects products from 9001, specifically: copyparty. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-54589? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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