CVE-2025-48953

Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads

Published Jun 3, 2025 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-16778 Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
Github GHSA Github GHSA GHSA-fr6r-p8hv-x3c4 Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
History
Type Values Removed Values Added
CPEs cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 3, 2025, 6:31 PM
Reserved
May 28, 2025, 6:49 PM
Status
Analyzed
Published
Jun 3, 2025, 7:15 PM
Modified
Jun 17, 2026, 9:30 AM