CVE-2021-33511

Name of the Vulnerable Software and Affected Versions Plone versions prior to 5.2.5

Description The issue allows for Server-Side Request Forgery (SSRF) via the lxml parser. This affects various components including Diazo themes, Dexterity TTW schemas, and modeleditors in plone.app.theming, plone.app.dexterity, and plone.supermodel.

Recommendations For Plone versions prior to 5.2.5, update to version 5.2.5 or later to resolve the issue. As a temporary workaround, consider restricting access to the lxml parser until a patch is available.