CVE-2022-23599: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Products.ATContentTypes are the core content types for Plone - Versions of Plone that are dependent on Products.ATContentTypes is vulnerable to reflected cross site scripting and open redirect when an attacker can get a compromised version of the image_view_fullscreen page in a cache, for example in Varnish. The technique is known as cache poisoning. Any later visitor can get redirected when clicking on a link on this page. Usually only anonymous users are affected, but this depends on the user’s cache settings. of Products.ATContentTypes has been released with a fix. This version works on Plone, Python 2 only. As a workaround, make sure the image_view_fullscreen page is not stored in the cache. More information about the vulnerability and cvmitigation measures is available in the GitHub Security Advisory.