Cross-site request forgery (CSRF) vulnerability in Siemens WinCC (TIA Portal) 11 and 12 before 12 SP1 allows remote attackers to hijack the authentication of unspecified victims by leveraging improper configuration of SIMATIC HMI panels by the WinCC product.
https://ics-cert.us-cert.gov/advisories/ICSA-13-213-02
https://exchange.xforce.ibmcloud.com/vulnerabilities/86099
http://www.securityfocus.com/bid/61536
http://secunia.com/advisories/54252
http://secunia.com/advisories/54051
http://scadastrangelove.blogspot.com/2013/08/ssa-064884-wincctia-portal-fixes.html