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
References3
- github.com/zauberzeug/nicegui/security/advisories/GHSA-2m4f-cg7… ExploitVendor Advisory
- github.com/zauberzeug/nicegui/security/advisories/GHSA-2m4f-cg7… ExploitVendor Advisory
- github.com/zauberzeug/nicegui/commit/58ad0b36e19922de16bbc79ea3… Patch
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 20 · as of 11 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.