What was exploitable: http://safecomputing.umich.edu/Alerts/03-31-15php.php (published one month ago).
Also consider: https://tools.digitalpoint.com/cookie-search?name=voluum-track-url
Detected this here for alert/it/alert-7.php? (see here: http://urlquery.net/report.php?id=1430167210617)
See: https://www.virustotal.com/nl/url/12f735b473573e4f8a6448f0a8d08751709005900195dc12796a672566857229/analysis/1430174512/
and Dr.Web flags as known infection source/adult content
Site returning error (40x): HTTP/1.1 403 Forbidden
Quttera misses detection: http://quttera.com/detailed_report/vids-online.com
polonus