Security expert discovered a critical flaw in Verizons FiOS mobile app that could be exploited to access the email account of any Verizon customer. It has been estimated that almost five million user accounts of Verizon FiOS application at risk. The vulnerability allows an attacker to access any account by simple manipulating user identification numbers in the web requests, the attack could give attackers the ability to read customers messages from a their Verizon inbox. The security experts at the Verizon team admitted the presence of the critical flaw and promptly issued a fix.”]
Source: https://securityaffairs.co/wordpress/32428/hacking/verizon-fios-app-flaw.html