CVE-2020-11997: Apache Guacamole

Medium severity, CVSS 4.3. EPSS: 1.2% chance of exploitation in the next 30 days.

Apache Guacamole 1.2.0 and earlier do not consistently restrict access to connection history based on user visibility. If multiple users share access to the same connection, those users may be able to see which other users have accessed that connection, as well as the IP addresses from which that connection was accessed, even if those users do not otherwise have permission to see other users.

Affected products

• Apache Guacamole: up to and including 1.2.0

Published 2021-01-19. Last modified 2026-06-17.