zauberzeug nicegui up to 3.3.x App.add_media_files path traversal

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in zauberzeug nicegui up to 3.3.x. This affects the function App.add_media_files. The manipulation results in path traversal. This vulnerability was named CVE-2025-66645. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in zauberzeug nicegui up to 3.3.x. It has been classified as critical. Affected is the function App.add_media_files. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-66645 since 12/05/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 3.4.0 eliminates this vulnerability. Applying the patch a1b89e2a24e1911a40389ace2153a37f4eea92a9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-201931). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: nicegui 3.4.0
Patch: a1b89e2a24e1911a40389ace2153a37f4eea92a9

Timelineinfo

12/05/2025 CVE reserved
12/10/2025 +5 days Advisory disclosed
12/10/2025 +0 days VulDB entry created
01/09/2026 +30 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-hxp3-63hc-5366
Status: Confirmed

CVE: CVE-2025-66645 (🔒)
GCVE (CVE): GCVE-0-2025-66645
GCVE (VulDB): GCVE-100-335508
EUVD: 🔒

Entryinfo

Created: 12/10/2025 07:34
Updated: 01/09/2026 18:31
Changes: 12/10/2025 07:34 (67), 01/09/2026 18:31 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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