What’s Vulnerable › Vulnerabilities

CVE-2025-54589: copyparty Reflected XSS via Filter Parameter

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-31 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• 9001 copyparty: before 1.18.7 — fixed in 1.18.7

How to fix

Upgrade to a fixed version: 9001 copyparty 1.18.7. Check the vendor advisory for mitigations.

References

• https://github.com/9001/copyparty/commit/a8705e611d05eeb22be5d3d7d9ab5c020fe54c62
• https://github.com/9001/copyparty/releases/tag/v1.18.7
• https://github.com/9001/copyparty/security/advisories/GHSA-8mx2-rjh8-q3jq

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