CVE-2025-48953

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Weakness enumeration

CWE-434

Affected software

Vendor	Product	Versions
umbraco	Umbraco-CMS	>= 14.0.0, < 15.4.2

References

https://github.com/umbraco/Umbraco-CMS/commit/d920e93d1ee29dc3301697e444f53e8cd5db3cf9Patch
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-fr6r-p8hv-x3c4Patch, Third Party Advisory

Timeline

Published: Jun 3, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

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