How security troubles occur if I don't cast a draw value?

How security troubles occur if I don't cast a draw value?

ts_3156ts_3156 Posts: 5Questions: 2Answers: 0

http://www.datatables.net/manual/server-side

This page says:

 it is strongly recommended for security reasons that you cast this parameter to an integer.

If I don't cast a draw value to an integer, how security troubles occur?
I want to know them concretely.

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