In Challenge 5, a successful injection often results in a "Welcome" message or a successful login redirect. 2. The Logic Bypass

To perform a UNION SELECT , your injected query must have the same number of columns as the original query. We need to find this number.

| Payload | Reason for Failure | |---------|--------------------| | ' OR 1=1 -- | Contains OR – blocked by filter. | | admin' AND '1'='1 | AND blocked. | | ' UNION SELECT null -- | UNION and SELECT blocked. | | ' ; DROP TABLE users -- | DROP blocked, also not injection context. |

This output should reveal columns such as userId , userName , and password .

If we get an error at 4, the original query is selecting .

This creates: WHERE username = 'admin' = '' – false.