This string is a classic example of a , specifically targeting databases like MySQL or MariaDB to identify vulnerabilities [1, 2].
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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 is the malicious command. It instructs the database to pause or "sleep" for 5 seconds before responding to the query [2, 3].
Ensure the database user account used by the web application has limited permissions. This string is a classic example of a
: This attempts to prematurely close the original, legitimate SQL query statement intended by the developers [2].
Malicious use of SLEEP() can lead to Denial of Service (DoS) by overloading the database with connection requests [3]. How to Prevent This Attack Learn more If you enter this payload into
Strict validation should be used to ensure input matches expected formats (e.g., integers only, no special characters).