Disclosure of users’ private tweets; Twitter confirmed the security incident
Last month, a new Twitter bug caused private Twitter Circle tweets to be publicly displayed to users in the For You tab. A month later, Twitter confirmed the security incident and announced a fix in an email.
Twitter Circle is a feature on Twitter that works similar to Instagram’s Close Friends. Thanks to Circle you can publish your tweets only to users who are on the list. This way you can make the account public but publish some tweets privately.