CVE-2011-1430: Ipswitch Imail

Medium severity, CVSS 6.8. EPSS: 3.2% chance of exploitation in the next 30 days.

The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

Affected products

• Ipswitch Imail: any version; up to and including 11.03; version 5.0 only; version 5.0.5 only; version 5.0.6 only; version 5.0.7 only; …

Published 2011-03-16. Last modified 2026-06-16.