CVE-2025-66645

HIGH 7.5EPSS 1.1%

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 v3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 1.09% chance of exploitation in the next 30 days, 63th percentile
Published: 2025-12-09
Updated: 2025-12-10

Proof-of-concept exploits (1)

advisories/GHSA-hxp3-63hc-5366

References

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