Snapchat: Server-Side Request Forgery using Javascript allows to exfill data from Google Metadata

Hey there, I was looking at your ads site with @daeken, we found some weird behavior in the import function of the creative app. Here are the steps: POC - Login to https://business.snapchat.com/ - Go to creative library - New Creative - Under "Topsnap Media", click on "Create" - Click on any of t...