The payload injects a subquery: (SELECT (CASE WHEN (6957=6957) THEN 1 ELSE 0 END) FROM DUAL) . This is a "Boolean test" to see if the logic holds true. :
AND 'pLsa'='pLs is a "dead end" string to balance out the remaining single quote from the original application code, preventing a syntax error that might mask the injection result. The payload injects a subquery: (SELECT (CASE WHEN
In Oracle, XMLType is used to parse XML data. If the XML is malformed, the database throws an error. : In Oracle, XMLType is used to parse XML data
When Oracle tries to parse the resulting string (e.g., <:qbqvq1qqbqq> ), it realizes it is not a valid XML format. It then returns an error message like: LPX-00110: XML parsing failed... at '<:qbqvq1qqbqq>' . It then returns an error message like: LPX-00110:
The payload attempts to force the database to trigger an error message that contains specific data, which confirms the vulnerability and the database type. :