{keyword}' And 6957=(select Upper(xmltype(chr(60)||chr(58)||chr(113)||chr(98)||chr(113)||chr(118)||chr(113)||(select (case When (6957=6957) Then 1 Else 0 End) From Dual)||chr(113)||chr(113)||chr(98)||chr(113)||chr(113)||chr(62))) From Dual) And 'plsa'='pls -

The attacker sees this error in the HTTP response. Because the error contains the 1 (the result of the subquery), the attacker knows the injection worked. :

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>' . The attacker sees this error in the HTTP response

The initial '{KEYWORD}' AND ... attempts to break out of a single-quoted string literal within a vulnerable SQL query. : It then returns an error message like: LPX-00110:

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. attempts to break out of a single-quoted string

: Configure the web server to show generic error pages instead of raw database error strings to the end user.