Twitter issues a warning revealing that attackers abused a legitimate functionality on its platform to unauthorizedly determine phone numbers associated with millions of its users’ accounts. The vulnerability resided in one of the APIs that has been designed to make it easier for users to find people they may already know on Twitter by matching phone numbers saved in their contacts with Twitter accounts. Twitter says several accounts engaged in the attack located in a wide range of countries, primarily from Iran, Israel, and Malaysia. The social networking site has since then addressed the issue and there is no action required from the users’ side.
Source: https://thehackernews.com/2020/02/find-twitter-phone-number.html