{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

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

If you enter this payload into a form and the website takes roughly 5 seconds longer than usual to load, it confirms that the application is vulnerable to SQL injection [2]. {KEYWORD}');SELECT SLEEP(5)#

This confirms a high-severity vulnerability that could allow attackers to bypass authentication, read sensitive data, or modify database contents.

If the payload works, an attacker can replace SLEEP(5) with more complex queries (e.g., IF(SUBSTRING((SELECT password FROM users),1,1)='a', SLEEP(5), 0) ) to extract data character-by-character based on whether the server pauses [3]. Security Implications : This is a comment character in MySQL

This string is a classic example of a , specifically targeting databases like MySQL or MariaDB to identify vulnerabilities [1, 2].

This technique is known as [3].

Here is a detailed breakdown of what this payload does and why it is used. Breakdown of the Payload