Twitter bug gives 3rd-party apps access to users' Direct Messages | Secondary Education; 21st Century Technology and Social Media |

"There should be millions of Twitter users that have signed in with Twitter into third-party applications. Some of these applications might have gained access to and might still have access to Twitter users private direct messages," he points out, and advises users to check third-party applications permissions and revoke the apps to which they never gave permission to access their DMs.

Via Gust MEES