Language: PHP
Label: vulnerable
CWE: CWE-352 \u2014 Cross-Site Request Forgery (CSRF)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Code:
                foreach($row as $field) {

                    if(is_null($field)) {
                        
                        $fieldData .= " NULL,";

                    } elseif( is_numeric($field) ) {

                        $fieldData .= " ".$field.",";

                    } else {
                        
                        $fieldData .= " '". $conn->real_escape_string($field) ."',";

                    }

                }