{keyword}';waitfor Delay '0:0:5'-- Instant

: Strict allow-listing of expected characters can prevent special symbols like ; or -- from reaching the query.

: Deploy a WAF to detect and block common SQL injection patterns automatically. {KEYWORD}';WAITFOR DELAY '0:0:5'--

: If the website takes exactly 5 seconds longer to load than usual after this input, the attacker knows the application is vulnerable to SQL injection. : Strict allow-listing of expected characters can prevent

: The single quote attempts to close the string literal in the original SQL statement. {KEYWORD}';WAITFOR DELAY '0:0:5'--

: This is a specific T-SQL (Microsoft SQL Server) command. It instructs the database engine to pause execution for exactly 5 seconds before returning a response.

: In many modern systems, database errors are hidden from the user. An attacker cannot see "Success" or "Error" messages.