CVE-2025-66645

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

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.

Affected

zauberzeug · nicegui

CVSS v3.1 GITHUB

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

1.12% chance of exploitation in the next 30 days, 66th percentile

Published

2025-12-09

Updated

2025-12-10

Proof-of-concept exploits (1)

• advisories/GHSA-hxp3-63hc-5366

Security advisories

• zauberzeug/nicegui/security/advisories/GHSA-hxp3-63hc-5366
• zauberzeug/nicegui/commit/a1b89e2a24e1911a40389ace2153a37f4eea92a9

References

• CVE Record
• NVD entry