CVE-2007-3709: Codeigniter

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

CRLF injection vulnerability in the redirect function in url_helper.php in CodeIgniter 1.5.3 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in an unspecified parameter, as demonstrated by a Set-Cookie header.

Affected products

• Codeigniter Codeigniter: version 1.5.3 only

Published 2007-07-11. Last modified 2026-06-16.