The remote web server contains a web application that is affected by a vulnerability that allows the creation of user accounts.
According to its banner, the version of Bugzilla running on the remote host falls within the range of 2.0 prior to 4.2.15, 4.3.1 prior to 4.4.10, or 4.5.1 prior to 5.0.1. Such versions are affected by an account creation bug that causes input passed via the 'login' parameter to be truncated, resulting in domain names of email addresses becoming corrupted. An unauthenticated, remote attacker can exploit this to create accounts with email addresses that differ from the original requests.
Upgrade to versions 4.2.15, 4.4.10, 5.0.1, or later.