Kupu 3.3.0 through 3.3.6, 4.0.0 through 4.0.10, 4.1.0 through 4.1.6, and 4.2.0 through 4.2.7 allows remote authenticated users to edit Kupu settings.
https://plone.org/security/hotfix/20150910/privilege-escalation-in-kupu
https://plone.org/security/hotfix/20150910