CVE-2021-36383: Xen-Orchestra Xo-Server

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Xen Orchestra (with xo-web through 5.80.0 and xo-server through 5.84.0) mishandles authorization, as demonstrated by modified WebSocket resourceSet.getAll data is which the attacker changes the permission field from none to admin. The attacker gains access to data sets such as VMs, Backups, Audit, Users, and Groups.

Affected products

Published 2021-07-12. Last modified 2026-06-17.