CVE-2020-28736: Plone

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

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).

Affected products

• Plone Plone: before 5.2.3 (fixed in 5.2.3)

Published 2020-12-30. Last modified 2026-06-17.