{keyword}) Union All Select Null,null# Apr 2026

UNION ALL SELECT NULL,NULL is used to determine the number of columns in the original query's SELECT statement. If the page loads without an error, the attacker knows the original table has exactly two columns [2].

Implement parameterized queries (e.g., using PDO in PHP or PreparedStatement in Java). This ensures the database treats the input as text, not executable code [4]. {KEYWORD}) UNION ALL SELECT NULL,NULL#

Ensure the database user account has the minimum permissions necessary, preventing access to system-level tables [4]. UNION ALL SELECT NULL,NULL is used to determine

Force a "True" result to log in without a password. UNION ALL SELECT NULL