GroupMe.com / unsecure accounts
On April 3, 2019, I signed up for a groupme account requires a phone number. After I put in my phone number it did not create a new account, but instead changed the account of the last person who used this number to my email. This allowed me to access all messages and chats submitted by the last user. Groupme does not take the security of its users seriously. It does not offer any protection for previous users of their service. By allowing me to access the previous users account, it causes me to be unable to use their service for 2 days. 2 days are required for an account to be deleted, so I could reset all contacts and chats. Groupme should not be trusted by users to maintain security of conversations as it has such an easy workaround. Groupme should upgrade their account security.