High 7.5Published Dec 9, 2025

CVE-2025-66645NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading

Updated under an hour ago (Oct 26, 2026, 11:50 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for zauberzeug nicegui

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 10, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

zauberzeug nicegui zauberzeug:nicegui (from the name)	before 3.4.0	CNA record
zauberzeug nicegui zauberzeug:nicegui	before 3.4.0	NVD

References

https://github.com/zauberzeug/nicegui/security/advisories/GHSA-hxp3-63hc-5366x-refsource-confirm, exploit, vendor-advisory
https://github.com/zauberzeug/nicegui/commit/a1b89e2a24e1911a40389ace2153a37f4eea92a9x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.