CVE-2025-66470

NiceGUI Stored/Reflected XSS in ui.interactive_image via unsanitized SVG content

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.

Affected

zauberzeug · nicegui

CVSS v3.1 GITHUB

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.25% chance of exploitation in the next 30 days, 16th percentile

Published

2025-12-09

Proof-of-concept exploits (1)

• advisories/GHSA-2m4f-cg75-76w2

Security advisories

• zauberzeug/nicegui/security/advisories/GHSA-2m4f-cg75-76w2
• zauberzeug/nicegui/commit/58ad0b36e19922de16bbc79ea3ddd29851b1a3e3

References

• CVE Record
• NVD entry