{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

: Use bind variables (e.g., ? or :1 ) so the input is treated as data, not executable code. The attacker sees this error in the HTTP response

: Systems running Oracle Database where user input is not properly sanitized or prepared using parameterized queries. Remediation The attacker sees this error in the HTTP response

CHR(113)CHR(98)CHR(113)CHR(118)CHR(113) = qbqvq (a unique tag/marker)