The Kaseya version 220.127.116.11 web interface (and possibly other versions) is vulnerable to Cross-Site Scripting in the "adminName" variable.
Use a HTML proxy such as WebScarab or Burp to intercept the HTML form post as it is submitted, and replace the "adminName" with the input above.
"System Version 18.104.22.168" (from information pane of affected web server) and possibly others.
Upgrade to the latest version. According to Kaseya, "The fix was actually deployed with hotfix #1686, Files Released to VSAUpdate, batch 499 on 1/30/2012 6:16:06 PM"
2011-11-11 Advisory Written. Vendor notified via web form and e-mail. 2012-01-31 Vendor acknowledges flaw. 2012-02-27 Vendor notifies of available fix. 2012-03-01 Attempt to coordinate release of information with vendor 2012-04-20 Published
(to be determined)
firstname.lastname@example.org (Mark Lachniet)