I am not sure if this is better served by incidents or bugtraq, but in 
any event here it is.  I frequently get the fake looking e-mails 
phishing for my Paypal, eBay, and banking login/password information.  
Generally the links to the spoofed webpages are just links to a fake 
page with a modified A HREF tag.  However, it appears someone has found 
that eBay's actual page has a command to redirect to a specified 
webpage.  While this shouldn't be a big risk, it still poses a small one 
and is being actively exploitated.
The page actually appears to link to eBay and it does, the link below is 
the one I received in my inbox recently.
http://cgi4.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=RedirectToDomain&DomainUrl=http%3A%2F%2F%32%31%31%2E%31%37%32%2E%39%36%2E%37%2FUpdateCenter%2FLogin%2F%3FMfcISAPISession%3DAAJbaQqzeHAAeMWZlHhlWXS2AlBXVShqAhQRfhgTDrferHCURstpAisNRqAhQRfhgTDrferHCURstpAisNRpAisNRqAhQRfhgTDrferHCUQRfqzeHAAeMWZlHhlWXh 
Simply:
http://cgi4.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=RedirectToDomain&DomainUrl=www.website.com 
Steven
steven@xxxxxxxxxxx