Clubhouse, the popular app that allows people to create digital newsgroups, says it is reviewing its data security practices after the Stanford Internet Observatory discovered potential vulnerabilities in its infrastructure that could allow external access to users’ raw audio data. The SIO confirmed that Agora Inc., a Shanghai-based start-up with offices in Silicon Valley, provides back-end infrastructure to Clubhouse and sells a “real-time voice and video engagement platform.” User identifiers are transmitted in clear text over the Internet, which makes them “easy to intercept,” noted the Observatory. User IDs are…