lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta failed to properly check for equality when validating the session cookie, allowing an attacker to gain administrative access with a large number of requests.
Zend.To version Prior to 5.15-1 contains a Cross Site Scripting (XSS) vulnerability in The verify.php page that can result in An attacker could execute arbitrary Javascript code in the context of the victim's browser..
Cross-site scripting (XSS) vulnerability in lib/NSSDropoff.php in ZendTo before 4.11-13 allows remote attackers to inject arbitrary web script or HTML via a modified emailAddr field to pickup.php.