{keyword} Union All Select Null,null,null,null,null,null,null,null,null,null-- Zvuz Today

: The attacker is attempting to determine the number of columns being returned by the original query. They add NULL values until the database stops returning an error, which reveals the table's structure.

: By injecting ten NULL values, the attacker is essentially asking the database, "Do you have ten columns?" If the page loads normally, the answer is "yes." : The attacker is attempting to determine the

: This is a placeholder for a legitimate search term or data input used by a web application. : This is a SQL comment symbol

: This is a SQL comment symbol. It tells the database to ignore everything that follows it, effectively neutralizing the rest of the original, legitimate code. : This is likely a "fingerprint" or a

: These tools can automatically detect and block common SQLi patterns like the one you provided.

: This is likely a "fingerprint" or a unique string used by automated scanning tools (like SQLmap) to identify if the injected code was successfully processed. The "Essay" of a Vulnerability