CVE-2007-1900: PHP

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

CRLF injection vulnerability in the FILTER_VALIDATE_EMAIL filter in ext/filter in PHP 5.2.0 and 5.2.1 allows context-dependent attackers to inject arbitrary e-mail headers via an e-mail address with a '\n' character, which causes a regular expression to ignore the subsequent part of the address string.

Affected products

• PHP PHP: version 5.2.0 only; version 5.2.1 only

Published 2007-04-10. Last modified 2026-06-16.