To limit the file types that can be uploaded through Bynder and to prevent malicious files from entering the Asset Library, you can set a special security check. In that way only the files with the specified extensions can be uploaded.
The system first scans the mime type of the file so even if the user changes the file extension, the file will fail the security check. Currently, there is no check for files uploaded with the Version Updater and Mass Uploader.
Make sure you have this feature enabled for your account. Contact your Bynder Customer Success Manager for information and help with the setup.collect