CVE-2012-5495
python_scripts.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to execute Python code via a crafted URL, related to "go_back."
Date published : 2014-09-30
https://github.com/plone/Products.CMFPlone/blob/4.2.3/docs/CHANGES.txt