Mega'/**/and/**/dbms_pipe.receive_message('a',2)='a Apr 2026

: 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.

: Ensure the database user account used by the application does not have permission to execute high-risk packages like DBMS_PIPE unless absolutely necessary. MEGA'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('a',2)='a

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

: This is the core of the attack. It calls a built-in Oracle function. MEGA'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('a',2)='a

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.