{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 Today

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 CHR() functions are used to bypass simple text filters. They translate to: CHR(60) = < CHR(58) = :

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. : When Oracle tries to parse the resulting string (e

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

CHR(113)CHR(98)CHR(113)CHR(118)CHR(113) = qbqvq (a unique tag/marker) The CHR() functions are used to bypass simple text filters

: Use bind variables (e.g., ? or :1 ) so the input is treated as data, not executable code.

In Oracle, XMLType is used to parse XML data. If the XML is malformed, the database throws an error. : : The core of the payload is SELECT UPPER(XMLType(

This string is a classic example of an payload, specifically targeting Oracle databases. Technical Breakdown