fix: sanitize_text_field added

Author: arifulhoque7

includes/Fields/Form_Field_Checkbox.php

@@ -130,7 +130,7 @@ public function prepare_entry( $field ) {
         check_ajax_referer( 'wpuf_form_add' );
 
         $field_name = isset( $_POST[$field['name']] ) ? array_map( 'sanitize_text_field', wp_unslash( $_POST[$field['name']] ) ) : [];
-        $field_name = array_map( 'strip_shortcodes', $field_name );
+        $field_name = array_map( 'sanitize_text_field', array_map( 'strip_shortcodes', $field_name ) );
 
         $entry_value  = ( is_array( $field_name ) && $field_name ) ? $field_name : [];