membership_tool.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to enumerate user account names via a crafted URL.

The App.Undo.UndoSupport.get_request_var_or_attr function in Zope before 2.12.21 and 3.13.x before 2.13.11, as used in Plone before 4.2.3 and 4.3 before beta 1, allows remote authenticated users to gain access to restricted attributes via unspecified vectors.

ftp.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to read hidden folder contents via unspecified vectors.

python_scripts.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to cause a denial of service (infinite loop) via an RSS feed request for a folder the user does not have permission to access.

Cross-site scripting (XSS) vulnerability in widget_traversal.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

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."

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 createObject.

atat.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to read private data structures via a request for a view without a name.

z3c.form, as used in Plone before 4.2.3 and 4.3 before beta 1, allows remote attackers to obtain the default form field values by leveraging knowledge of the form location and the element id.

queryCatalog.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to bypass caching and cause a denial of service via a crafted request to a collection.