{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

To prevent this, you should concatenate user input directly into SQL strings. Instead:

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. To prevent this, you should concatenate user input

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>' . To prevent this

: If successful, an attacker can extract sensitive data (usernames, passwords, database version) one piece at a time by reflecting that data inside the error messages. To prevent this, you should concatenate user input

: Strict allow-listing of expected characters for the {KEYWORD} field.