: Filter and sanitize all user-provided data to block unexpected characters like UNION , SELECT , or # .
: This ensures the database treats the input as literal data rather than executable code.
This pattern is often the "reconnaissance" phase of an attack. Once an attacker knows how many columns a table has and which ones are displayed on the screen, they can replace the dummy numbers with commands to extract sensitive data, such as usernames, passwords, or system configurations. How to Prevent These Attacks To protect your applications, developers should:
This specific string is designed to trick a web application into running an unintended database command: