CVE-2020-28736

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).

Date published : 2020-12-30

https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt

https://github.com/plone/Products.CMFPlone/issues/3209