CVE-2025-54589 PoC — copyparty Reflected XSS via Filter Parameter

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-54589.yaml

Associated Vulnerability

Title:copyparty Reflected XSS via Filter Parameter (CVE-2025-54589)
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.

Description

Copyparty before 1.18.7 is vulnerable to reflected cross-site scripting (XSS) via the 'filter' parameter in the '/?ru' endpoint. Unsanitized user input is reflected in the HTML response, allowing attackers to execute arbitrary JavaScript in the context of the victim's browser.

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