{keyword} And 4477=4477 | 2026 |

When a web application is not properly secured, it might take this text and insert it directly into a database query. For example:

: This represents a legitimate search term or data field (like a username or product ID) that the web application expects to receive. {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 When a web application is not properly secured,

: If a site responds to this string, it means it is not "sanitizing" user input, leaving it open to a full-scale data breach. If the application returns the same result for

: 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. How the Attack Works