Description

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to Reflected XSS through its ui.add_css, ui.add_scss, and ui.add_sass functions. The functions lack proper sanitization or encoding for the JavaScript context they generate. An attacker can break out of the intended <style> or <script> tags by injecting closing tags (e.g., </style> or </script>), allowing for the execution of arbitrary JavaScript. This issue is fixed in version 3.4.0.

INFO

Published Date :

2025-12-08T23:54:37.955Z

Last Modified :

2025-12-09T16:03:54.125Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2025-66469 vulnerability.

Vendors Products
Nicegui
  • Nicegui
Zauberzeug
  • Nicegui
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-66469.

URL Resource
https://github.com/zauberzeug/nicegui/commit/a8fd25b7d5e23afb1952d0f60a1940e18b5f1ca8 cve-icon cve-icon
https://github.com/zauberzeug/nicegui/security/advisories/GHSA-72qc-wxch-74mg cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact