Nextcloud: Reflected XSS in U2F plugin by shipping the example endpoints

While running a RIPS scan against our instrumentalized source code it noticed that the file /apps/twofactoru2f/vendor/yubico/u2flib-server/examples/localstorage/index.php echoes on user input: F145451 I was first a tad confused because the examples have been removed from our Git repository, but t...