CVE-2025-66469 describes a Reflected Cross-Site Scripting (XSS) vulnerability in NiceGUI, a Python UI framework, affecting versions 3.3.1 and below. The flaw stems from insufficient sanitization in ui.add_css, ui.add_scss, and ui.add_sass functions, allowing attackers to inject arbitrary JavaScript by breaking out of style or script tags. This vulnerability carries a CVSS score of 6.1 (MEDIUM), indicating a network-based attack with low complexity, requiring user interaction, and leading to low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.4.0CPE matchmatch criteria | cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.