Uploading Files? You Might Be Sharing More than You Realize

Introduction I recently uploaded a file to a Nextcloud instance. After the upload, I saw that the file timestamp in Nextcloud is already some months old. But I just uploaded it, right? I double checked and saw that it matches the one on my local file system. How is this possible? Is a web application really able to read the last modification timestamp of the file? Apparently. I was not aware of…