viewaction.html in Merak Mail Server 7.4.5 with Icewarp Web Mail 5.2.7 and possibly other versions allows remote attackers to (1) delete arbitrary files via the originalfolder parameter or (2) move arbitrary files via the messageid parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17976
http://www.securityfocus.com/bid/11371