Ensure the database user account used by the web application has limited permissions.
SQL Injection is a vulnerability where an attacker interferes with the queries an application makes to its database. The payload "-5025 ORDER BY 1#" is an "Inference" or "Error-based" probe used to determine the structure of a database table without having direct access to the source code.
This is the gold standard. It treats user input strictly as data, never as executable code. -5025 ORDER BY 1#
This is the terminator . It attempts to break out of the developer's intended string literal. If the application does not sanitize input, the database engine will see this quote and assume the original command has ended, allowing the attacker to append their own logic.
Here is a short technical paper outlining its structure, purpose, and how to defend against it. 1. Introduction Ensure the database user account used by the
SELECT name, email FROM users WHERE id = "-5025" ORDER BY 1#";
The ORDER BY clause tells the database to sort results by a specific column. This is the gold standard
Attackers increment this number (e.g., ORDER BY 2 , ORDER BY 3 ). When the database throws an error (e.g., "The ORDER BY position number 10 is out of range"), the attacker knows exactly how many columns the original query is fetching.