CVE-2005-3366: PHP Icalendar

Medium severity, CVSS 6.8. EPSS: 2.4% chance of exploitation in the next 30 days.

PHP file inclusion vulnerability in index.php in PHP iCalendar 2.0a2 through 2.0.1 allows remote attackers to execute arbitrary PHP code and include arbitrary local files via the phpicalendar cookie. NOTE: this is not a cross-site scripting (XSS) issue as claimed by the original researcher.

Affected products

• PHP Icalendar PHP Icalendar: version 2.0.1 only; version 2.0a2 only; version 2.0b only; version 2.0c only

Published 2005-10-30. Last modified 2026-06-16.