Unspecified vulnerability in Zope 2.12.x and 2.13.x, as used in Plone 4.0.x through 4.0.9, 4.1, and 4.2 through 4.2a2, allows remote attackers to execute arbitrary commands via vectors related to the p_ class in OFS/misc_.py and the use of Python modules.
https://bugzilla.redhat.com/show_bug.cgi?id=742297
http://zope2.zope.org/news/security-vulnerability-announcement-cve-2011-3587
http://secunia.com/advisories/46323
http://secunia.com/advisories/46221
http://pypi.python.org/pypi/Products.PloneHotfix20110928/1.0
http://plone.org/products/plone/security/advisories/20110928
http://plone.org/products/plone-hotfix/releases/20110928/PloneHotfix20110928-1.0.zip