CVE-2000-1203: Lotus Domino

Medium severity, CVSS 5.0. EPSS: 2.5% chance of exploitation in the next 30 days.

Lotus Domino SMTP server 4.63 through 5.08 allows remote attackers to cause a denial of service (CPU consumption) by forging an email message with the sender as bounce@[127.0.0.1] (localhost), which causes Domino to enter a mail loop.

Affected products

• Lotus Domino: version 4.6.1 only; version 4.6.3 only; version 4.6.4 only; version 5.0.1 only; version 5.0.2 only; version 5.0.3 only; …

Published 2001-08-20. Last modified 2026-06-16.