Cross-site request forgery (CSRF) vulnerability in the web server on Siemens SIMATIC S7-1200 CPU devices with firmware before 4.1.3 allows remote attackers to hijack the authentication of unspecified victims via unknown vectors.
https://ics-cert.us-cert.gov/advisories/ICSA-15-239-02
https://cert-portal.siemens.com/productcert/pdf/ssa-134003.pdf
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-134003.pdf
http://www.securitytracker.com/id/1033419
http://packetstormsecurity.com/files/172315/Siemens-SIMATIC-S7-1200-Cross-Site-Request-Forgery.html