CVE-2025-66470Public exploitNetwork attack vector

Browser script execution via unsanitized SVG content

Published Dec 9, 2025 · Updated Dec 9, 2025

Cross-site scripting in Zauberzeug NiceGUI 3.3.1 and earlier allows remote attackers to execute browser scripts via crafted SVG content. The component inserts its content property into the DOM through Vue's v-html directive without sanitizing SVG foreignObject markup. Execution requires a consuming application to pass attacker-controlled content into ui.interactive_image and a user to render or update the component; resulting scripts run in that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in Zauberzeug NiceGUI 3.3.1 and earlier allows remote attackers to execute browser scripts via crafted SVG content. The component inserts its content property into the DOM through Vue's v-html directive without sanitizing SVG foreignObject markup. Execution requires a consuming application to pass attacker-controlled content into ui.interactive_image and a user to render or update the component; resulting scripts run in that user's browser context.

The record

CVE
CVE-2025-66470
Published
Dec 9, 2025
Updated
Dec 9, 2025
Vendor
Zauberzeug
Product
NiceGUI
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zauberzeug · NiceGUIversion=< 3.4.0

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo