If the page loads normally, the attacker knows the database is expecting 6 columns.
: NULL is used because it is compatible with almost any data type (integers, strings, dates, etc.).
Here is a detailed breakdown of what each component of this specific string does: 1. {KEYWORD} If the page loads normally, the attacker knows
Scanners append strings like GoJB so that the security researcher can search the website's logs or the page's source code later to confirm that their input was successfully processed and reflected by the server. Summary of the Attack Flow
Developers should use Parameterized Queries (Prepared Statements), which treat user input as literal data rather than executable code. {KEYWORD} Scanners append strings like GoJB so that
This is likely a or "signature" used by an automated vulnerability scanner (such as Burp Suite, SQLmap, or Acunetix).
If the page returns an error (like "The used SELECT statements have a different number of columns"), the attacker will try again with five or seven NULL values until the error disappears. 4. -- (The Comment) In SQL, double-dashes signify the start of a comment. If the page returns an error (like "The
: This "comments out" the rest of the original SQL query written by the developers.