Plone CMS Improper Control of Generation of Code (Code Injection) Vulnerability - CVE-2007-5741
Plone 2.5 through 2.5.4 and 3.0 through 3.0.2 allows remote attackers to execute arbitrary Python code via network data containing pickled objects for the (1) statusmessages or (2) linkintegrity module which the module unpickles and executes.