Receipt before iOS7, The Receipt can be successfully verified with an incorrect password.

There are fake receipts used by hackers, which are the receipts before iOS7.The Receipt can be successfully verified with an incorrect password.Is this a bug?https://developer.apple.com/documentation/appstorereceipts/verifyreceipt --Do I need to completely drop compatibility for this?

FB number is https://feedbackassistant.apple.com/feedback/13205370 but the ticket's status is Investigation complete - Unable to diagnose with current information,but No reply message

Receipt before iOS7, The Receipt can be successfully verified with an incorrect password.
 
 
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