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NiceGUI Reflected XSS in ui.add_css, ui.add_scss, and ui.add_sass via Style Injection

🗓️ 08 Dec 2025 21:30:20Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 6 Views

Reflected XSS in NiceGUI 3.3.1 via ui.add_css, ui.add_scss, and ui.add_sass from unsanitized style and script injection.

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09 Dec 2025 16:28Current
6Medium risk
Vulners AI Score6
CVSS 3.16.1
EPSS0.00042
SSVC
6