Google OAuth Vulnerability Exposes Millions via Failed Startup Domains

New research has pulled back the curtain on a “deficiency” in Google’s “Sign in with Google” authentication flow that exploits a quirk in domain ownership to gain access to sensitive data.
“Google’s OAuth login doesn’t protect against someone purchasing a failed startup’s domain and using it to re-create email accounts for former employees,” Truffle Security co-founder and CEO Dylan Ayrey said