Best Practical reports:
RT 3.0.0 and above, if running on Perl 5.14.0 or higher, are vulnerable to a remote denial-of-service via the email gateway; any installation which accepts mail from untrusted sources is vulnerable, regardless of the permissions configuration inside RT. This denial-of-service may encompass both CPU and disk usage, depending on RT's logging configuration. This vulnerability is assigned CVE-2014-9472. RT 3.8.8 and above are vulnerable to an information disclosure attack which may reveal RSS feeds URLs, and thus ticket data; this vulnerability is assigned CVE-2015-1165. RSS feed URLs can also be leveraged to perform session hijacking, allowing a user with the URL to log in as the user that created the feed; this vulnerability is assigned CVE-2015-1464.