I believe it was found to be social eng upon an employee see https://www.vice.com/en_us/article/jgxd3d/twitter-insider-access-panel-account-hacks-biden-uber-be

I believe it was found to be social eng upon an employee see https://www.vice.com/en_us/article/jgxd3d/twitter-insider-access-panel-account-hacks-biden-uber-bezos https://www.vice.com/en_us/article/jgxd3d/twitter-insider-ac...