Plone CMS Improper Access Control Vulnerability - CVE-2015-7315
Plone 3.3.0 through 3.3.6 4.0.0 through 4.0.10 4.1.0 through 4.1.6 4.2.0 through 4.2.7 4.3.0 through 4.3.6 and 5.0rc1 allows remote attackers to add a new member to a Plone site with registration enabled without acknowledgment of site administrator.