{keyword} And 5161=2181-- Qoyo Review

If the page loads normally (the same as the original, legitimate query), it tells the attacker that the query is being evaluated, but the AND False didn't change the outcome.

: This is a Boolean statement. The server evaluates this as False because 5161 does not equal 2181.

If the page breaks, returns an error, or shows no content, it confirms that the application is vulnerable to SQL injection because the AND False successfully changed the query's behavior. {KEYWORD} AND 5161=2181-- qoyo

: This is a SQL comment marker (in MySQL, PostgreSQL, etc.). It instructs the database engine to ignore everything that follows it in the query.

: A junk string used as a filler to complete the SQL syntax structure. Purpose of this Payload If the page loads normally (the same as

The attacker adds this to a URL parameter or input field (e.g., ?id=1' AND 5161=2181-- qoyo ). Boolean Logic Test:

This is a basic attempt to see if security measures are in place. If the page breaks, returns an error, or

If you are running a , a bug bounty program , or testing your own code , I can provide specific examples of: How to prevent this using prepared statements. What to look for in a WAF (Web Application Firewall) log.