Advisories for Pypi/Plone.supermodel package

Plone before 5.2.3 allows SSRF attacks via the tracebacks feature (only available to the Manager role).

Plone before 5.2.3 allows XXE attacks via a feature that is protected by an unapplied permission of plone.schemaeditor.ManageSchemata (therefore, only available to the Manager role).

Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.