Select Null,null,null,null,null,null,null,null,null-- Zljd | {keyword}') Union All

: This is the SQL comment symbol. It tells the database to ignore everything that follows it in the code, effectively "muting" the rest of the original, legitimate query.

The string is constructed to "break out" of a standard search query and force the database to execute a new, malicious command. : This is the SQL comment symbol

: These are placeholders. For a UNION attack to work, the second query must have the exact same number of columns as the first. Attackers use NULL to test and match the column count without causing data type errors. : These are placeholders

: Instead of building query strings with user input, use placeholders ( ? ). This ensures the database treats input as literal text, not executable code. : Instead of building query strings with user

: The user-provided input. The ' and ) are used to close the developer’s original SQL statement (e.g., SELECT * FROM products WHERE name = ('$KEYWORD') ).

: They can bypass login screens by injecting code that always evaluates to "True."

Below is a breakdown of what this code is, how it works, and the risks it poses. 🛠️ Anatomy of the Payload