Mega'/**/and/**/dbms_pipe.receive_message('a',2)='a | PRO ⇒ |

In a "blind" injection, the database doesn't return error messages or data directly to the screen. Instead, the attacker observes the : The attacker sends the request.

This confirmation allows them to move on to more destructive queries, such as extracting usernames, passwords, or entire table structures, one character at a time based on these time delays. Mitigation and Defense MEGA'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('a',2)='a

The second parameter ( 2 ) tells the database to wait for for a message. In a "blind" injection, the database doesn't return

: Strict allow-listing of input (e.g., ensuring a "Username" field only contains alphanumeric characters). Mitigation and Defense The second parameter ( 2

If the page takes ~2 seconds longer than usual to load, they know the DBMS_PIPE command was successfully executed.

: These are SQL comment tags used in place of spaces. Attackers use this technique to bypass Web Application Firewalls (WAFs) or filters that might block standard whitespace.