CVE-2025-66645

NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading

State: Published
Severity: 7.5 High
Published: Dec 9, 2025
Updated: Dec 10, 2025
Reserved: Dec 5, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
niceguizauberzeug	< 3.4.0Affected

References

https://github.com/zauberzeug/nicegui/security/advisories/GHSA-hxp3-63hc-5366
https://github.com/zauberzeug/nicegui/commit/a1b89e2a24e1911a40389ace2153a37f4eea92a9

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