user.php in the Billing Control Panel in phpCoupon allows remote authenticated users to obtain Premium Member status, and possibly acquire free coupons, via a modified URL containing a certain billing parameter and REQ=auth, status=success, and custom=upgrade substrings, possibly related to PayPal transactions.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Phpcoupon | Phpcoupon | * | * |