Hi everyone, Today, I'm going to share how I found a Local File Inclusion that affected companies like Facebook, Linkedin, Dropbox and many others. The LFI was located at the cloud system of Oracle Responsys. For those who do not know Responsys is an enterprise-scale cloud-based business to consumer (B2C). Responsys gives every Business their own "private IP" to use the system in a private way. Business are not sharing IP with other companies.) How did I found this bug? Well as usual I was looking for bugs and I note that Facebook was sending me developer emails from the subdomain em. facebookmail.com. For example on my inbox, I had emails from fbdev@em.facebookmail.com This got me interested on the subdomain em.facebookmail.com and after a quick DIG I note that this subdomain was connected to "Responsys" which I had previously seen in other Pentests Responsys is providing em.facebookmail.com with the email services as you can see above. T...