Attackers frequently use various methods to exploit UNION SQL injection flaws. A common strategy involves discovering the number of fields given by the original query, often through error-based approaches or stealthy discovery. Once the count is determined, harmful SQL code can be crafted to combine the results of the original query with data check

Union-based SQL injection represents a particularly severe attack vector, allowing malicious actors to combine the results of multiple SELECT statements into a single output. The exploitation typically involves crafting SQL queries that utilize the UNION operator to append data from unauthorized tables or even entirely different databases. This can