Attackers frequently utilize various techniques to leverage UNION SQL injection flaws. A common strategy involves discovering the number of columns returned by the original query, often through error-based techniques or blind discovery. Once the quantity is determined, rogue SQL queries can be crafted to join the results of the original query with

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