Senior Security Analyst Zach Julian recently found that Sarahah, a popular anonymous messaging app, has been uploading users’ private data to its company servers. The Daily DotSarahah Has Been Covertly Uploading Your Address Book to Its Servers discusses this and the company’s response. Read more about Sarahah’s access to user’s contact information in Julian’s blog post Hot New ‘Anonymous’ Chat Hijacks Millions of Contact Data.