{keyword} Union All Select Null,null,null,null-- Uizf ✔

: Confirm that the application is vulnerable to SQL injection.

: In some cases, these injections can be used to log in without a valid password.

: This is a SQL comment symbol. It tells the database to ignore the rest of the original, legitimate query, effectively "breaking" the intended logic to execute the injected code. {KEYWORD} UNION ALL SELECT NULL,NULL,NULL,NULL-- Uizf

This string is a classic example of a , specifically a Union-Based SQLi attack . It is used by attackers to test for vulnerabilities or extract data from a database. Breakdown of the Payload

: This command tells the database to combine the results of the original query with a new "injected" query. : Confirm that the application is vulnerable to

: This represents the original search term or input field. The attacker appends the malicious code to this keyword.

If you found this in a "complete report" (such as a security scan or a web server log), it indicates that an automated tool or a manual actor has the system. It tells the database to ignore the rest

: The attacker is attempting to determine the number of columns returned by the original database query. By adding NULL values until the page loads without an error, they can identify the table's structure.

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{keyword} Union All Select Null,null,null,null-- Uizf ✔

: Confirm that the application is vulnerable to SQL injection.

: In some cases, these injections can be used to log in without a valid password.

: This is a SQL comment symbol. It tells the database to ignore the rest of the original, legitimate query, effectively "breaking" the intended logic to execute the injected code.

This string is a classic example of a , specifically a Union-Based SQLi attack . It is used by attackers to test for vulnerabilities or extract data from a database. Breakdown of the Payload

: This command tells the database to combine the results of the original query with a new "injected" query.

: This represents the original search term or input field. The attacker appends the malicious code to this keyword.

If you found this in a "complete report" (such as a security scan or a web server log), it indicates that an automated tool or a manual actor has the system.

: The attacker is attempting to determine the number of columns returned by the original database query. By adding NULL values until the page loads without an error, they can identify the table's structure.