/secure/admin/jira/AcknowledgeTask.jspa is an open redirect

The AcknowledgeTask.jspa page found under http://$HOST/secure/admin/jira/AcknowledgeTask.jspa can be used to redirect users to another page on the internet and possibly used to create a non-persistent xss flaw. Here is an example url which will direct a user to http://google.com...