What’s Vulnerable › Vulnerabilities

CVE-2025-21618: NiceGUI On Air authentication issue

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-06 · updated 2026-06-17
• Weakness: CWE-287

Description

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

References

• https://github.com/zauberzeug/nicegui/commit/1621a4ba6a06676b8094362d36623551e651adc1
• https://github.com/zauberzeug/nicegui/security/advisories/GHSA-v6jv-p6r8-j78w

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