OAuth Misconfiguration Enables Third-Party Account Hijacking
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🔗 OAuth Misconfiguration Leads to Third-Party Account Hijacking. A recent bug fix in a rewards points program revealed a critical flaw in its OAuth implementation, allowing attackers to hijack user accounts linked to third-party services like fitness classes. The vulnerability stemmed from improper verification of the “redirect_uri,” enabling attackers to send phishing links that redirected victims to their own servers. Once victims completed the OAuth flow, attackers could intercept authorization codes and link the victims’ accounts to their own, gaining unauthorized access to manage bookings. This incident highlights the importance of secure OAuth practices to prevent account takeovers in applications that integrate with third-party services.
