The Change Password dialog box (change_password) in Sophos Web Appliance before 3.8.2 allows remote authenticated users to change the admin user password via a crafted request.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-2874
http://www.zerodayinitiative.com/advisories/ZDI-14-069/
http://www.sophos.com/en-us/support/knowledgebase/120230.aspx
http://www.securityfocus.com/bid/66734