I have an openredirect vulnerability on my web application. You can learn about this with the following link: https://stackoverflow.com/questions/48340714/azure-ad-b2c-vulnerable-to-open-redirect
Because it is a problem with a Microsoft product, it is not possible to fix this.
So I'm wondering if it is possible with IIS, to filter a GET parameter for a specific URL.
I just want to authorize one URL in the post_logout_redirect_uri GET parameters.