This treats user input as data only, never as executable code. It is the most effective defense against SQLi.
: This operator combines the results of the original query with a new, malicious query. This allows an attacker to retrieve data from other tables that they weren't supposed to see. This treats user input as data only, never
: This is the SQL comment symbol. It tells the database to ignore the rest of the original, legitimate query that follows the injection point, preventing syntax errors. This allows an attacker to retrieve data from
SQL Injection occurs when untrusted user input is concatenated directly into a database query, allowing an attacker to manipulate the original command. SQL Injection occurs when untrusted user input is
: This is a random string (often called a "cache buster" or signature) used by security researchers or automated scanners to identify their specific request in server logs. The Objective of the Attack
The string you provided, '{KEYWORD}' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL-- viGJ , is a classic example of a , specifically a Union-Based SQL Injection attack.
Once confirmed, the attacker would replace the NULL values with functions like version() , user() , or table names (e.g., information_schema.tables ) to begin exfiltrating sensitive data. Prevention and Mitigation