Multiple cross-site request forgery (CSRF) vulnerabilities in Oxwall before 1.8 allow remote attackers to hijack the authentication of administrators for requests that (1) put the website under maintenance via the maintenance_enable parameter or (2) conduct cross-site scripting (XSS) attacks via the maintenance_text parameter to admin/pages/maintenance.
https://www.exploit-db.com/exploits/38581/
http://www.securityfocus.com/archive/1/536784/100/0/threaded