Cross-site scripting (XSS) vulnerability in Zimbra Collaboration Suite (aka ZCS) before 8.8.0 Beta2 might allow remote attackers to inject arbitrary web script or HTML via vectors related to the "Show Snippet" functionality.
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://bugzilla.zimbra.com/show_bug.cgi?id=107925
http://www.securityfocus.com/archive/1/541661/100/0/threaded