A bug introduced in an iOS software update on the Edison Mail app allowed emails to be viewed by strangers. Edison Mail, a popular third-party email app, has warned thousands of iOS users that their emails may have been compromised after a security flaw exposed emails to complete strangers. The issue appeared to stem from a new syncing feature that was rolled out in the Friday update (update 1.20.2) Edison Mail said it has resolved the issue as of Saturday, and all accounts have been secured.
Source: https://threatpost.com/edison-mail-ios-bug-exposes-emails-to-strangers/155814/