Kentico Xperience <= 12.0.29 MVC Forms Unrestricted File Upload

Advisories

severity: high
date: December 18, 2025
Affecting: Xperience <= 12.0.29
CVE: CVE-2019-25229
CWE: CWE-434 Unrestricted Upload of File with Dangerous Type
CVSS: 8.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: Kentico DevNet Hotfixes
Credit: Kentico Security Team
Description: An unrestricted file upload vulnerability in Kentico Xperience allows authenticated users with 'Read data' permissions to upload arbitrary file types via MVC form file uploader components. Attackers can manipulate file names and upload potentially malicious files to the system, enabling unauthorized file uploads.