https://www.bleepingcomputer.com/news/security/hackers-can-hack-your-online-accounts-before-you-even-register-them/

Security researchers have revealed that hackers can hijack your online accounts before you even register them by exploiting flaws that have been already been fixed on popular websites, including Instagram, LinkedIn, Zoom, WordPress, and Dropbox.

Andrew Paverd, a researcher at Microsoft Security Response Center, and Avinash Sudhodanan, an independent security researcher, analyzed 75 popular online services and found that at least 35 are vulnerable to account pre-hijacking attacks.