CVE-2003-1302: PHP

Medium severity, CVSS 5.0. EPSS: 1.4% chance of exploitation in the next 30 days.

The IMAP functionality in PHP before 4.3.1 allows remote attackers to cause a denial of service via an e-mail message with a (1) To or (2) From header with an address that contains a large number of "\" (backslash) characters.

Affected products

• PHP PHP: version 4.2 only; version 4.2.0 only; version 4.2.1 only; version 4.2.2 only; version 4.2.3 only; version 4.3.0 only

Published 2003-12-31. Last modified 2026-06-16.