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

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].

The ) and } characters attempt to close existing function calls or brackets in the original SQL statement. {KEYWORD}) UNION ALL SELECT NULL,NULL#

Force a "True" result to log in without a password. Implement parameterized queries (e

Sanitize inputs to block special characters like ) , # , and -- . Implement parameterized queries (e.g.

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].