rt -- Remote DoS, Information disclosure and Session Hijackingvulnerabilities

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.