If a website isn't "sanitizing" user input, an attacker can use these tricks to:
: In MySQL, this is a comment symbol. It tells the database to ignore the rest of the legitimate code, preventing syntax errors that would break the attack. Why You Should Care -1469 UNION ALL SELECT 34,34#
: This is a dummy value. By using a negative or non-existent ID, the attacker ensures the first part of the query returns no results, making room for the injected data to show up. If a website isn't "sanitizing" user input, an
If you were looking to write a blog post about this topic, here is a quick breakdown of what it means and why it matters: What is SQL Injection (SQLi)? By using a negative or non-existent ID, the
SQL injection is a web security vulnerability that allows an attacker to interfere with the queries that an application makes to its database. Breaking Down the Payload:
Access private user info or credit card numbers. Bypass Login: Log in as an admin without a password. Wreak Havoc: Delete or modify entire databases. How to Stay Safe