CVE-2019-18345: Davical

Critical severity, CVSS 9.3. EPSS: 2.2% chance of exploitation in the next 30 days.

A reflected XSS issue was discovered in DAViCal through 1.1.8. It echoes the action parameter without encoding. If a user visits an attacker-supplied link, the attacker can view all data the attacked user can view, as well as perform all actions in the name of the user. If the user is an administrator, the attacker can for example add a new admin user to gain full access to the application.

Affected products

• Davical Davical: up to and including 1.1.8
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only

Published 2019-12-12. Last modified 2026-06-17.