Open redirect vulnerability in the integrated web server on Siemens SIMATIC S7-1200 CPU devices with firmware before 4.1 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.
https://cert-portal.siemens.com/productcert/pdf/ssa-597212.pdf
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-597212.pdf