Best Practical Request Tracker (RT) before 4.4.7 and 5.x before 5.0.5 allows Information Disclosure via fake or spoofed RT email headers in an email message or a mail-gateway REST API call.
The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.