Union select sql injection attack | sql injection test 2
Union Select sql injection allow the attacker to retrieve data from database and dump databases. By this technique attacker displayed data from more than two tables. It shows the combine result from two table.
Why are attacker using union ?
Union perform the result from two select queries. Attacker have no control but they can perform UNION with another SELECT query designed by themselves and will display the result which will be union of the results of 2 queries.