A bug was recently revealed showing that users of Twitter can get any other user to follow them by tweeting “accept” followed by “@” and any Twitter user name. Twitter officially confirmed that the bug was real and immediately set about fixing it.
We identified and resolved a bug that permitted a user to ‘force’ other users to follow them. We re now working to rollback all abuse of the bug that took place. Follower/following numbers are currently at 0; we re aware and this too should shortly be resolved, wrote Twitter in its official blog. Of note: protected updates did not become public as a result of this bug.
Source: CNet
