What’s Vulnerable › Vulnerabilities

CVE-2025-66470: NiceGUI Stored/Reflected XSS in ui.interactive_image via unsanitized SVG content

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-09 · updated 2026-10-07
• Weakness: CWE-79

Description

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 products

• zauberzeug nicegui: before 3.4.0 — fixed in 3.4.0

How to fix

Upgrade to a fixed version: zauberzeug nicegui 3.4.0. Check the vendor advisory for mitigations.

References

• https://github.com/zauberzeug/nicegui/commit/58ad0b36e19922de16bbc79ea3ddd29851b1a3e3
• https://github.com/zauberzeug/nicegui/security/advisories/GHSA-2m4f-cg75-76w2
• https://github.com/zauberzeug/nicegui/security/advisories/GHSA-2m4f-cg75-76w2

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