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Status published
Medium
CVE-2025-48953
Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
umbraco
View all reports →Affected Software
Umbraco-CMS
Vulnerable Versions:
>= 14.0.0, < 15.4.2
Timeline
Official Publish:
June 3rd, 2025
Last Modified:
June 3rd, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L