CVE-2005-1807: PHPMailer

Medium severity, CVSS 5.0. EPSS: 4.5% chance of exploitation in the next 30 days.

The Data function in class.smtp.php in PHPMailer 1.7.2 and earlier allows remote attackers to cause a denial of service (infinite loop leading to memory and CPU consumption) via a long header field.

Affected products

• PHPMailer PHPMailer: up to and including 1.72

Published 2005-05-28. Last modified 2026-06-16.