WebSummit: Subdomain Takeover at http://gameday.websummit.net

As i said in the title i found a subdomain takeover vulnerability on the url http://gameday.websummit.net The url was trying to find a bucket that didn't exist from a probably forgotten dns entry that was at gameday.websummit.net.s3-website-eu-west-1.amazonaws.com So i created a bucket with the...