X (Formerly Twitter): HTTP 401 response injection on "amp.twimg.com/amplify-web-player/prod/source.html" through "image_src" parameter

Overview The imagesrc parameter on amp.twimg.com accepts images from any arbitrary host, therefore, enabling attackers to supply image destinations that respond with a "HTTP 401 Unauthorized" response. Description HTTP 401 attacks occur when there is no whitelisting or proxying images and/or page...