Arbitrary file upload in Umbraco CMS - CVE-2025-48953
Published: June 3, 2025
Vulnerability identifier: #VU110089
CSH Severity: Medium
CVSS v4: 7.3 [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]
CVE-ID: CVE-2025-48953
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Umbraco CMS
How to mitigate CVE-2025-48953
Install updates from vendor's website.
Umbraco CMS - addressed in versions 15.4.2, 16.0.0