: This is a logical operator used to join two conditions.
Because 4477=4477 is always true, the database treats the entire condition as valid. If the application returns the same result for this query as it does for a normal search of just {KEYWORD} , the attacker knows the application is . They can then replace 4477=4477 with more dangerous commands to steal passwords, delete data, or bypass login screens. Why This Matters {KEYWORD} AND 4477=4477
: If a site responds to this string, it means it is not "sanitizing" user input, leaving it open to a full-scale data breach. : This is a logical operator used to join two conditions
: This is a "tautology"—a statement that is always true. How the Attack Works They can then replace 4477=4477 with more dangerous
When a web application is not properly secured, it might take this text and insert it directly into a database query. For example:
: Developers prevent this by using parameterized queries (prepared statements), which ensure that the database treats the entire string as literal text rather than executable code.
SELECT * FROM products WHERE category = '{KEYWORD} AND 4477=4477';