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
The string is a classic example of a SQL Injection (SQLi) payload, specifically used for database reconnaissance. -5025 ORDER BY 1#
This is the gold standard. It treats user input strictly as data, never as executable code. The database ignores the final quote and semicolon,
SELECT name, email FROM users WHERE id = "-5025" ORDER BY 1#"; This is the gold standard
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 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 .
The number 1 refers to the first column in the SELECT statement.