Language: Go
Label: safe
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
func Sanitizer(fl validator.FieldLevel) (res bool) {
	field := fl.Field()
	switch field.Kind() {
	case reflect.String:
		filter := bluemonday.UGCPolicy()
		field.SetString(filter.Sanitize(field.String()))
		return true
	case reflect.Chan, reflect.Map, reflect.Slice, reflect.Array:
		return field.Len() > 0
	case reflect.Ptr, reflect.Interface, reflect.Func:
		return !field.IsNil()
	default:
		return field.IsValid() && field.Interface() != reflect.Zero(field.Type()).Interface()
	}
}