CVE-2006-1291: PHP Icalendar

High severity, CVSS 7.5. EPSS: 7.1% chance of exploitation in the next 30 days.

publish.ical.php in Jim Hu and Chad Little PHP iCalendar 2.21 and earlier does not require authentication for write access to the calendars directory, which allows remote attackers to upload and execute arbitrary PHP scripts via a WebDAV PUT request with a filename containing a .php extension and a trailing null character.

Affected products

• PHP Icalendar PHP Icalendar: up to and including 2.2.1; version 2.0 only; version 2.0.1 only; version 2.0a2 only; version 2.0b only; version 2.0c only; …

Published 2006-03-19. Last modified 2026-06-16.