CVE-2025-21618: Zauberzeug Nicegui

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

NiceGUI is an easy-to-use, Python-based UI framework. Prior to 2.9.1, authenticating with NiceGUI logged in the user for all browsers, including browsers in incognito mode. This vulnerability is fixed in 2.9.1.

Affected products

• Zauberzeug Nicegui: before 2.9.1 (fixed in 2.9.1)

Published 2025-01-06. Last modified 2026-06-17.