Someone found a clever #sidechannel to abuse #Cloudflare CDN caching to reveal the approximate location (~location of next big datacenter) of #Signal and #Discord users by sending them a message/notification with an image in it that is fetched from the CDN:https://gist.github.com/hackermondev/45a3cdfa52246f1d1201c1e8cdef6117@signalapp