CVE-2007-0681: Extcalendar Project Extcalendar

Critical severity, CVSS 9.8. EPSS: 5.2% chance of exploitation in the next 30 days.

profile.php in ExtCalendar 2 and earlier allows remote attackers to change the passwords of arbitrary users without providing the original password, and possibly perform other unauthorized actions, via modified values to register.php.

Affected products

• Extcalendar Project Extcalendar: up to and including 2

Published 2007-02-03. Last modified 2026-06-16.