: This operator combines the result set of the original query with a new, forged query. UNION ALL is often preferred over UNION because it is faster and doesn't remove duplicate rows, which can sometimes interfere with the attack. SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL :
This payload is a classic example of a attack, specifically a Union-Based technique used to exfiltrate data from a database. Technical Breakdown : This operator combines the result set of
: If successful, an attacker can bypass authentication, read sensitive data (passwords, PII), and in some configurations, modify or delete data. Technical Breakdown : If successful, an attacker can
: NULL is used because it is compatible with almost any data type (string, integer, date, etc.). Once the attacker finds the correct number of columns (in this case, 8), they will replace the NULL values one by one with actual data-gathering functions (like @@version or user() ). Technical Breakdown : If successful