Hello all, We have recently become aware of an important security issue that affects all released Zope versions including the recent 2.2 beta 1 release. The issue involves an inadequately protected method in one of the base classes in the DocumentTemplate package that could allow the contents of DTMLDocuments or DTMLMethods to be changed remotely or through DTML code without forcing proper user authorization. A Zope 2.1.7 release has been made that resolves this issue for Zope 2.1.x users. This release is available from Zope.org: http://www.zope.org/Products/Zope/2.1.7/ A patch is also available if it is not feasible to update your Zope installation at this time (the patch is based on 2.1.6): http://www.zope.org/Products/Zope/2.1.7/DT_String.diff If you are evaluating any of the recent 2.2 alpha or beta releases, you should apply the patch noted above if your site is accessible by untrusted clients. A forthcoming 2.2 beta 2 release will contain the fix for this issue. While we know of no instances of this issue being used to exploit a site, we *highly* recommend that any Zope site that is accessible by untrusted clients take the appropriate mitigation steps immediately. Brian Lloyd brian@digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com