-5025 Order By 1# Official

The string is a classic example of a SQL Injection (SQLi) payload, specifically used for database reconnaissance.

Use allow-lists to ensure inputs match expected formats (e.g., ensuring an ID is always a positive integer). -5025 ORDER BY 1#

Here is a short technical paper outlining its structure, purpose, and how to defend against it. 1. Introduction The string is a classic example of a

This is often a "false" or "null" value. By inputting a value that likely doesn't exist (like a negative ID), the attacker forces the application to return an empty result set or an error. This makes it easier to see how the database reacts when the injected code is added. ORDER BY 1 : This is the structural probe . This makes it easier to see how the

This is the gold standard. It treats user input strictly as data, never as executable code.

The database ignores the final quote and semicolon, executes the sort, and confirms to the attacker that the query is valid and contains at least one column. 4. Impact

Successful use of this payload is the first step in a larger attack. Once the number of columns is known, an attacker can use a UNION SELECT statement to: Extract usernames and passwords. Bypass authentication screens. Gain administrative access to the server.