The file upload dialog now offers a configuration option that allows only files with permitted extensions to be uploaded.
Restrict upload to specific file types
Date:
September 22, 2025
By default, the OpenCms upload dialog accepts any file type, including formats like videos (.mp4 etc.), which tend to be very large and are often not meant to be uploaded.
With the new configuration option, you can now define a whitelist of allowed file extensions. This makes it possible to restrict uploads to the desired file types.