{keyword}');select Sleep(5)# -

: This is a comment character in MySQL. It tells the database to ignore the rest of the original SQL statement, ensuring the injected command doesn't cause a syntax error [1]. Purpose: Blind SQL Injection

: This is the malicious command. It instructs the database to pause or "sleep" for 5 seconds before responding to the query [2, 3].

This is the primary defense. It ensures that user input is treated as data, not as executable code [4]. {KEYWORD}');SELECT SLEEP(5)#

Strict validation should be used to ensure input matches expected formats (e.g., integers only, no special characters).

: This represents the legitimate input field or parameter in a web application (e.g., a search box, user ID field, or URL parameter) [1]. : This is a comment character in MySQL

: This attempts to prematurely close the original, legitimate SQL query statement intended by the developers [2].

This confirms a high-severity vulnerability that could allow attackers to bypass authentication, read sensitive data, or modify database contents. It instructs the database to pause or "sleep"

This technique is known as [3].