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TI-2025-40897 Aliases CVE-2025-66470GHSA-2m4f-cg75-76w2

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

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00254 17th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed nicegui (zauberzeug): 3.4.0nicegui (PyPI): 3.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zauberzeugniceguibefore 3.4.03.4.0Patch availableCNA
—nicegui (PyPI)before 3.4.03.4.0Patch availableGHSA-2m4f-cg75-76w2
  • nicegui Vendorzauberzeug Affected before 3.4.0 Fixed in 3.4.0 Patch available CNA
  • nicegui (PyPI) Vendor— Affected before 3.4.0 Fixed in 3.4.0 Patch available GHSA-2m4f-cg75-76w2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:*before 3.4.0Vulnerablezauberzeug
  • cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:* Versions before 3.4.0 Vulnerable ·zauberzeug

Remediation

  • Fix · CNA nicegui (zauberzeug) Fixed in 3.4.0
  • Fix · GHSA-2m4f-cg75-76w2 nicegui (PyPI) Fixed in 3.4.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66470
  2. 2026-10-03 Alias added: GHSA-2m4f-cg75-76w2

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2025-41029 NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading CVSS 3.1HIGH 7.5
  • TI-2026-17574 Zero-click XSS in all NiceGUI apps which uses `ui.sub_pages` CVSS 3.1HIGH 7.2
  • TI-2026-17575 NiceGUI has Redis connection leak via tab storage causes service degradation CVSS 3.1MEDIUM 5.3
  • TI-2026-17573 NiceGUI apps are vulnerable to XSS which uses `ui.sub_pages` and render arbitrary user-provided links CVSS 3.1MEDIUM 6.1
  • TI-2026-17572 NiceGUI is vulnerable to XSS via Unescaped URL in ui.navigate.history.push() / replace() CVSS 3.1MEDIUM 6.1
  • TI-2025-40896 NiceGUI Reflected XSS in ui.add_css, ui.add_scss, and ui.add_sass via Style Injection CVSS 3.1MEDIUM 6.1
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences