CVE-2012-5501
at_download.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to read arbitrary BLOBs (Files and Images) stored on custom content types via a crafted URL.
Date published : 2014-09-30
https://github.com/plone/Products.CMFPlone/blob/4.2.3/docs/CHANGES.txt