Plone CMS before 3 places a base64 encoded form of the username and password in the __ac cookie for all user accounts, which makes it easier for remote attackers to obtain access by sniffing the network.

Plone 2.0.5, 2.1.2, and 2.5-beta1 does not restrict access to the (1) changeMemberPortrait, (2) deletePersonalPortrait, and (3) testCurrentPassword methods, which allows remote attackers to modify portraits.