CVE-2017-16906: Horde Groupware

Medium severity, CVSS 5.4. EPSS: 1.1% chance of exploitation in the next 30 days.

In Horde Groupware 5.2.19-5.2.22, there is XSS via the URL field in a "Calendar -> New Event" action.

Affected products

• Horde Groupware: from 5.2.19, up to and including 5.2.22

Published 2017-11-20. Last modified 2026-06-17.