CVE-2025-48953 MEDIUM

CVE-2025-48953: Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads

Vendor Umbraco
Product Umbraco-CMS
Weakness CWE-434 · Unrestricted file upload
Published June 3, 2025
Last update June 3, 2025
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Umbraco is an ASP.NET content management system (CMS). Starting in version 14.0.0 and prior to versions 15.4.2 and 16.0.0, it's possible to upload a file that doesn't adhere with the configured allowable file extensions via a manipulated API request. The issue is patched in versions 15.4.2 and 16.0.0. No known workarounds are available.

Key dates

02Disclosure timeline

June 3, 2025 CVE published
June 3, 2025 Record updated