Order By 1# — -5025

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

Ensure the database user account used by the web application has limited permissions.

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. -5025 ORDER BY 1#

SELECT name, email FROM users WHERE id = "$input";

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

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.

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 It attempts to break out of the developer's

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