: In some cases, these injections can be used to log in without a valid password.
This string is a classic example of a , specifically a Union-Based SQLi attack . It is used by attackers to test for vulnerabilities or extract data from a database. Breakdown of the Payload {KEYWORD} UNION ALL SELECT NULL,NULL,NULL,NULL-- Uizf
: The attacker is attempting to determine the number of columns returned by the original database query. By adding NULL values until the page loads without an error, they can identify the table's structure. : In some cases, these injections can be