The form signup API responds in a failure state, with a redirection URL. That URL blindly uses the `Referer` header as passed-in. This shows up a security issue in a few places, although it's not very exploitable.  Nonetheless, we don't need the host to show up in the redirection URL at all. The signup success API is already using a redirect URL without host, for example.  With the changes in this PR, the failure response also uses a host-less redirect.  |
||
|---|---|---|
| .. | ||
| main | ||
| test | ||