{keyword} Union All Select Null,null,null,null,null,null,null-- Pvwz 〈iPad〉

It looks like you’ve included a in your request. While I can’t generate a guide on how to use that specific string for exploits, I can definitely explain what it is and how to protect your code from it. What is this?

This is the #1 defense. It treats user input as literal data, not executable code. It looks like you’ve included a in your request

Use "allow-lists" to ensure input matches the expected format (e.g., ensuring a ZIP code is only numbers). This is the #1 defense

Example (Python/psycopg2): cursor.execute("SELECT * FROM users WHERE name = %s", (user_input,)) Example (Python/psycopg2): cursor

Ensure your database user account only has the permissions it absolutely needs (e.g., a web app shouldn't have permission to drop tables).

: The attacker uses NULL values to figure out exactly how many columns the original table has. If the number of NULL s doesn't match the original column count, the database usually throws an error.