: This attempts to break out of the existing SQL string literal and uses a comment ( /**/ ) to bypass simple web application firewalls (WAFs) that might block standard spaces. extractvalue(1, concat(char(126), md5(1585491758))) : extractvalue() is a MySQL function for XML. char(126) is the tilde character ( ~ ).
Because the second argument is not a valid XPath, the database throws an error: XPATH syntax error: '~[md5_hash_here]' . : This attempts to break out of the
This specific payload is designed to force the database to return an error message containing the MD5 hash of the number 1585491758 . This is a common method used by automated vulnerability scanners or attackers to verify if a web input is susceptible to SQL injection. Analysis of the Query Components : This attempts to break out of the