CVE-2021-33509: Plone

Critical severity, CVSS 9.9. EPSS: 2% chance of exploitation in the next 30 days.

Plone through 5.2.4 allows remote authenticated managers to perform disk I/O via crafted keyword arguments to the ReStructuredText transform in a Python script.

Affected products

• Plone Plone: up to and including 5.2.4

Published 2021-05-21. Last modified 2026-06-17.