Arbitrary file upload in Umbraco CMS - CVE-2025-48953
Published: June 3, 2025
Vulnerability identifier: #VU110089
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-48953
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Umbraco
Affected software:
Umbraco CMS
Umbraco CMS
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient validation of file during file upload within API request. A remote user can upload a malicious file and execute it on the server.
How to mitigate CVE-2025-48953
Install updates from vendor's website.