sequential (5)

https://wodewangzhishime.blogspot.com/2021/10/httpswodewangzhishime_78.html

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Ref: https://wodewangzhishime.blogspot.com/2021/07/httpswodewangzhishime_5.html . 

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The process is that 

int result = "select from the database where keyword = skin head".

MOV Web server, result.

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Hackers change it into 

int result = "select from database where keyword = skin head or dick head".

Mov Web server, result.

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John: Consequently, the web server return to the users the datas of skin head as well as the datas of dick head.