Advisory id: FSA:018
1) Description:
Error occured in cal_event.php:
$dquery = "delete from ".$EVENTS_TB." where id='$id'";
Error occured in cal_popup.php:
$id = $_GET['id'];
2) Proof of concept:
http://example/[c_path]/cal_event.php?id=[SQL_QUERY]
http://example/[c_path]/cal_popup.php?id=[SQL_QUERY]
3) Solution:
on cal_event.php sanitized $id variable,
on cal_popup.php don't use $_GET['id'] to assign a value.