The text you provided is a classic example of a payload. Specifically, it uses the UNION ALL SELECT statement to attempt to trick a database into revealing unauthorized information or appending malicious data to a legitimate query. What is happening in this string?
: This is a comment operator in SQL. It tells the database to ignore the rest of the legitimate code that follows, effectively neutralizing any security checks at the end of the original query. Why you might be seeing this The text you provided is a classic example of a payload
Never trust user input. Use allow-lists to ensure only expected data types (like numbers or plain text) are processed. The text you provided is a classic example of a payload