{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 -

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

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

: Use bind variables (e.g., ? or :1 ) so the input is treated as data, not executable code. : Strict allow-listing of expected characters for the

The payload attempts to force the database to trigger an error message that contains specific data, which confirms the vulnerability and the database type. :

: SQL Injection (Error-Based/Out-of-Band). or :1 ) so the input is treated as data, not executable code

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. :

CHR(113)CHR(98)CHR(113)CHR(118)CHR(113) = qbqvq (a unique tag/marker) The payload injects a subquery: (SELECT (CASE WHEN

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