An exposé on the exploitation of Cloudflare’s CDN by a teenage hacker has raised questions about the inherent vulnerabilities of CDNs in maintaining user anonymity and security. A weakness in Cloudflare’s CDN caching behavior was manipulated by the “attacker” to reveal the rough locations of users on websites such as Signal, an encrypted messaging service, and Discord, a VoIP social platform. The simple backdoor was based on locations of datacenters where content had been cached after request by an end user, per an interview with The Register. A bug in the serverless scripting service designed to route traffic through datacenters was exploited by the 15-year old high school junior, or so they claim, by sending specific packets like images to…