What is CVE-2025-66645?

CVE-2025-66645 is a high-severity vulnerability in Zauberzeug Nicegui, classified under Path Traversal. CVSS score: 7.5/10. Published 2025-12-09.

How severe is CVE-2025-66645?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Zauberzeug Nicegui

CVE-2025-66645

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…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.008 (73.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Zauberzeug Nicegui — versions < 3.4.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

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

Frequently asked questions

What is CVE-2025-66645?: CVE-2025-66645 is a high-severity vulnerability in Zauberzeug Nicegui, classified under Path Traversal. CVSS score: 7.5/10. Published 2025-12-09.
How severe is CVE-2025-66645?: High severity. CVSS v3 base score is 7.5 out of 10.