BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-10

Assigner: GitHub, Inc.

Description

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.add_media_files() function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-09

Last Modified

2025-12-10

Generated

2026-07-06

AI Q&A

2025-12-10

EPSS Evaluated

2026-07-05

NVD

CVE-2025-66645

Affected Vendors & Products

Vendor	Product	Version / Range
nicegui	nicegui	3.3.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

Executive Summary

This vulnerability in NiceGUI versions 3.3.1 and below involves a directory traversal issue in the App.add_media_files() function. It allows a remote attacker to read arbitrary files on the server filesystem by exploiting this flaw.

Impact Analysis

An attacker exploiting this vulnerability can read sensitive files on the server, potentially exposing confidential information, configuration files, or other data that should be protected. This can lead to information disclosure without requiring authentication.

Mitigation Strategies

Upgrade NiceGUI to version 3.4.0 or later, as this version fixes the directory traversal vulnerability in the App.add_media_files() function.

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