: This is a "tautology"—a statement that is always true. How the Attack Works
: Automated tools often use specific numbers like 4477 to "fingerprint" a site and see how it responds to logical tests. {KEYWORD} AND 4477=4477
: 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. : This is a "tautology"—a statement that is always true
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 Because 4477=4477 is always true, the database treats
: This represents a legitimate search term or data field (like a username or product ID) that the web application expects to receive.
SELECT * FROM products WHERE category = '{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.