CVE-2021-33512: Plone

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

Plone through 5.2.4 allows stored XSS attacks (by a Contributor) by uploading an SVG or HTML document.

Affected products

• Plone Plone: up to and including 5.2.4

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