Cross-site request forgery (CSRF) vulnerability on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 and SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 allows remote attackers to hijack the authentication of unspecified victims via unknown vectors.
https://cert-portal.siemens.com/productcert/pdf/ssa-654382.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-654382.pdf
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdf