my-bank.com backend replays requests to bank.com

Yes, that’s a phising technique. CORS, CSP, or CSFR tokens can’t prevent it.

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bank.com can mitigate it by blocking my-bank.com IPs

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This 2007 paper [1] is about the initial mitigation idea, which was using Extended Validation Certificates (EV SSL). The study showed that users didn't pay attention to the special UI address bar EV certs had. In 2018 Chrome removed that UI style [2]

[1] http://www.usablesecurity.org/papers/jackson.pdf

[2] https://www.ghacks.net/2018/05/18/google-chrome-removal-of-s...