Is it good practice to use email returned from SNS OAuth account?












0















Is there any chance for this situation happening?




  • Alice creates an account with her email alice@example.com on my system.


  • Bob registers a new account on some OAuth provider (Ex. Google, Facebook, Twitter, ...) with Alice's email alice@example.com. However, on the OAuth provider system, his registered email is not activated. Because he can not access Alice's email


  • Bob uses OAuth provider account to login to my system. My system uses his OAuth account to retrieve his account information from the OAuth provider, including email address (alice@example.com). My system recognizes that there is an account already associated with this alice@example.com email, i.e. Alice's created account in the step 1. And just link the OAuth account into Alice's account and let Bob login into Alice's account.



Is there any reference from OAuth authentication definition that forces OAuth provider to only return safe email address?



Thank you










share|improve this question



























    0















    Is there any chance for this situation happening?




    • Alice creates an account with her email alice@example.com on my system.


    • Bob registers a new account on some OAuth provider (Ex. Google, Facebook, Twitter, ...) with Alice's email alice@example.com. However, on the OAuth provider system, his registered email is not activated. Because he can not access Alice's email


    • Bob uses OAuth provider account to login to my system. My system uses his OAuth account to retrieve his account information from the OAuth provider, including email address (alice@example.com). My system recognizes that there is an account already associated with this alice@example.com email, i.e. Alice's created account in the step 1. And just link the OAuth account into Alice's account and let Bob login into Alice's account.



    Is there any reference from OAuth authentication definition that forces OAuth provider to only return safe email address?



    Thank you










    share|improve this question

























      0












      0








      0








      Is there any chance for this situation happening?




      • Alice creates an account with her email alice@example.com on my system.


      • Bob registers a new account on some OAuth provider (Ex. Google, Facebook, Twitter, ...) with Alice's email alice@example.com. However, on the OAuth provider system, his registered email is not activated. Because he can not access Alice's email


      • Bob uses OAuth provider account to login to my system. My system uses his OAuth account to retrieve his account information from the OAuth provider, including email address (alice@example.com). My system recognizes that there is an account already associated with this alice@example.com email, i.e. Alice's created account in the step 1. And just link the OAuth account into Alice's account and let Bob login into Alice's account.



      Is there any reference from OAuth authentication definition that forces OAuth provider to only return safe email address?



      Thank you










      share|improve this question














      Is there any chance for this situation happening?




      • Alice creates an account with her email alice@example.com on my system.


      • Bob registers a new account on some OAuth provider (Ex. Google, Facebook, Twitter, ...) with Alice's email alice@example.com. However, on the OAuth provider system, his registered email is not activated. Because he can not access Alice's email


      • Bob uses OAuth provider account to login to my system. My system uses his OAuth account to retrieve his account information from the OAuth provider, including email address (alice@example.com). My system recognizes that there is an account already associated with this alice@example.com email, i.e. Alice's created account in the step 1. And just link the OAuth account into Alice's account and let Bob login into Alice's account.



      Is there any reference from OAuth authentication definition that forces OAuth provider to only return safe email address?



      Thank you







      web-services security authentication oauth oauth-2.0






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 14 '18 at 16:02









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