-4640 Union All Select — Null,null,null,null,'qbqvq'||'lbznmmwdachxaypteqetdoupxsqdsedwqcwkldne'||'qqbqq',null,null,null,null-- Exgp

: Likely used as an invalid ID to force the original query to return no results, making the injected data the only output.

: Scanners look for the unique middle string ( LBzNMMwda... ) surrounded by these markers in the server's response. If it appears, the vulnerability is confirmed. -- ExGP : : Likely used as an invalid ID to

Are you seeing this in your or during a security audit ? : Likely used as an invalid ID to

: These act as placeholders to match the exact number of columns expected by the original query. : Likely used as an invalid ID to

: This command instructs the database to append a new set of data to the result set.