CVE-2002-1783: PHP

Medium severity, CVSS 5.0. EPSS: 16.7% chance of exploitation in the next 30 days.

CRLF injection vulnerability in PHP 4.2.1 through 4.2.3, when allow_url_fopen is enabled, allows remote attackers to modify HTTP headers for outgoing requests by causing CRLF sequences to be injected into arguments that are passed to the (1) fopen or (2) file functions.

Affected products

• PHP PHP: version 3.0.14 only; version 3.0.15 only; version 3.0.16 only; version 3.0.17 only; version 3.0.18 only; version 4.0.3 only; …

Published 2002-12-31. Last modified 2026-06-16.