zauberzeug nicegui up to 3.3.x interactive_image cross site scripting

Summaryinfo

A vulnerability was found in zauberzeug nicegui up to 3.3.x. It has been rated as problematic. Affected by this issue is some unknown functionality of the component interactive_image. This manipulation causes cross site scripting. This vulnerability appears as CVE-2025-66470. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in zauberzeug nicegui up to 3.3.x and classified as problematic. Affected by this vulnerability is an unknown function of the component interactive_image. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are subject to a XSS vulnerability through the ui.interactive_image component of NiceGUI. The component renders SVG content using Vue's v-html directive without any sanitization. This allows attackers to inject malicious HTML or JavaScript via the SVG <foreignObject> tag whenever the image component is rendered or updated. This is particularly dangerous for dashboards or multi-user applications displaying user-generated content or annotations. This issue is fixed in version 3.4.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-66470 since 12/02/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 3.4.0 eliminates this vulnerability. Applying the patch 58ad0b36e19922de16bbc79ea3ddd29851b1a3e3 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• zauberzeug

Name

• nicegui

Version

• 3.0
• 3.1
• 3.2
• 3.3

License

• open-source

Website

• Product: https://github.com/zauberzeug/nicegui/

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