{keyword} And 4477=4477 -

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

: This is a "tautology"—a statement that is always true. How the Attack Works {KEYWORD} AND 4477=4477

When a web application is not properly secured, it might take this text and insert it directly into a database query. For example: Because 4477=4477 is always true, the database treats

: If a site responds to this string, it means it is not "sanitizing" user input, leaving it open to a full-scale data breach. Why This Matters : This is a "tautology"—a

: This is a logical operator used to join two conditions.