Medium CVSS 6.3

Overview

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.

Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 6.3 (MEDIUM)
  • Detected tags: xss (tag impact: MODERATE)

Recommended actions:

  • Apply context-aware output encoding.
  • Enable Content-Security-Policy and HttpOnly/SameSite cookies.

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