SQL Injection in DTML or in connection objects in Plone 4.0 through 5.2.1 allows users to perform unwanted SQL queries. (This is a problem in Zope.) References: https://plone.org/security/hotfix/20200121/sql-injection-in-dtml-or-in-connection-objects https://plone.org/security/hotfix/20200121
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-7939