If you are seeing this in your logs, it means an automated scanner or attacker is probing your site for weaknesses. You can defend against this by:
: This wraps the malicious query in a way that attempts to maintain valid SQL syntax by closing existing quotes and ensuring the final condition ( 'mppV'='mppV' ) is always true. If you are seeing this in your logs,
CHAR(103)||CHAR(112)||CHAR(87)||CHAR(114) translates to . : Use a WAF to automatically block requests
: Use a WAF to automatically block requests containing known SQL injection patterns. If you are seeing this in your logs,
Are you seeing these queries in your or a specific application's search field ?
The query asks the database: "If the first characters of a system user name equal 'ykFj', is that equal to 'gpWr'?" Since these strings do not match, the query is likely being used as a test. An attacker monitors whether the application's response changes (e.g., a different error message or a successful page load) based on whether the injected condition evaluates to true or false. How to Protect Your Site
: Ensure your application uses Prepared Statements to separate user input from the SQL command.