CVE-2018-5751: Open-Xchange Appsuite

Medium severity, CVSS 6.5. EPSS: 9.1% chance of exploitation in the next 30 days.

The backend component in Open-Xchange OX App Suite before 7.6.3-rev36, 7.8.x before 7.8.2-rev39, 7.8.3 before 7.8.3-rev44, and 7.8.4 before 7.8.4-rev22 allows remote authenticated users to obtain sensitive information about external guest users via vectors related to the "groups" and "users" APIs.

Affected products

• Open-Xchange Open-Xchange Appsuite: up to and including 7.6.3; version 7.6.3 only; version 7.8.0 only; version 7.8.2 only; version 7.8.3 only; version 7.8.4 only

Published 2018-06-16. Last modified 2026-06-17.