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.
Problem types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Product status
References
github.com/...icegui/security/advisories/GHSA-72qc-wxch-74mg
github.com/...icegui/security/advisories/GHSA-72qc-wxch-74mg
github.com/...ommit/a8fd25b7d5e23afb1952d0f60a1940e18b5f1ca8
