: Submit the payload. If successful, the query will return all rows (e.g., all coupons or user data), revealing the result key or a "VIP Coupon Code". Information Security Stack Exchange Tool-Based Solution (sqlmap)
Keep adding or removing numbers until the application stops throwing an error. This tells you how many columns the original SELECT statement had. Sql Injection Challenge 5 Security Shepherd
For Challenge 5, the magic number is often or 4 columns. : Submit the payload
If you are using this article for defensive training, here is how to prevent Challenge 5 from existing in your own code: : Submit the payload. If successful
Since '' = '' is true, the condition reduces to username='admin' , allowing login.