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Project description

This is a critical security hotfix which should be applied to the following versions of Zope:

  • Zope 2.13 <= 2.13.7 (Plone 4.1 <= 4.1rc3)
  • Zope 2.12 <= 2.12.18 (Plone 4.0 <= 4.0.7)
  • Any version of Zope 2.10 or Zope 2.11 where PloneHotfix20110720 is installed (Plone 3.0, 3.1, 3.2 and 3.3 <= 3.3.5).

Additional information about the hotfix including frequently asked questions is available at

This hotfix applies the following modifications to improve Zope security:

  • Disables the acquire, attribute, item, lang and vh traversers.
  • Patches the traverse method of zope.traversing.namespaces.resource.


Installation instructions can be found at


1.0 (2011-06-28)

  • Initial release

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