Google suffers from an open redirection vulnerability. This may be working as designed, but is still a bad idea.
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Problem:
Google suffers from an open redirect that can be used to trick users into
visiting sites not originating from google.com
Example:
http://www.google.com/local/add/changeLocale?currentLocation=http://www.bing.com
http://www.google.com/local/add/changeLocale?currentLocation=http://www.tubgirl.ca
Regards
suckure