Gorouter in Cloud Foundry cf-release v141 through v228 allows man-in-the-middle attackers to conduct cross-site scripting (XSS) attacks via vectors related to modified requests.

An issue was discovered in Cloud Foundry Foundation routing-release versions prior to 0.142.0 and cf-release versions 203 to 231. Incomplete validation logic in JSON Web Token (JWT) libraries can allow unprivileged attackers to impersonate other users to the routing API, aka an "Unauthenticated JWT signing algorithm in routing" issue.