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CVE-2025-66470

MediumPublished

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

Published: Dec 9, 2025
Updated: Dec 9, 2025
Assigning CNA: GitHub_M
Evidence observed: Aug 22, 2026

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 17.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-66470Scanner
A fast, simple scanner for detecting CVE-2025-66470 - XSS vulnerability in NiceGUI's ui.interactive_image component.

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