-7728') Union All Select 34,34,34,34# [VALIDATED · SOLUTION]

: Attackers can replace the dummy "34" values with actual database commands to steal usernames, passwords, or sensitive customer data.

: This operator combines the results of the original query with a new set of data. -7728') UNION ALL SELECT 34,34,34,34#

: These are "dummy" values used to determine the correct number of columns in the original table. For a UNION to work, the second query must have the exact same number of columns as the first. : Attackers can replace the dummy "34" values

To secure a system against these types of attacks, developers should use Parameterized Queries (Prepared Statements) rather than building queries with string concatenation. This ensures that user input is always treated as data, not as executable code. For a UNION to work, the second query

: It allows an attacker to identify the structure of your database tables.

: This attempts to close an existing single-quote string and provide a non-existent ID so that the primary query returns no results.

: These are comment characters used to "comment out" the rest of the original, legitimate SQL query so it doesn't cause a syntax error. Vulnerability Report