If the oauth wall is managed by PHP, then it looks like the answer is yes, you’re vulnerable to client connections that haven’t logged in.
This looks like a bug in PHP’s assembly of multipart responses & you can feed one of those to the PHP backend with a simple web request, no auth required I think.
This looks like a bug in PHP’s assembly of multipart responses & you can feed one of those to the PHP backend with a simple web request, no auth required I think.