CVE-2025-66645: Zauberzeug Nicegui

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.add_media_files() function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0.

Affected products

• Zauberzeug Nicegui: before 3.4.0 (fixed in 3.4.0)

Published 2025-12-09. Last modified 2026-06-17.