CVE-2021-32633 – Remote Code Execution via traversal in TAL expressions

https://notcve.org/view.php?id=CVE-2021-32633

Zope is an open-source web application server. In Zope versions prior to 4.6 and 5.2, users can access untrusted modules indirectly through Python modules that are available for direct use. By default, only users with the Manager role can add or edit Zope Page Templates through the web, but sites that allow untrusted users to add/edit Zope Page Templates through the web are at risk from this vulnerability. The problem has been fixed in Zope 5.2 and 4.6. As a workaround, a site administrator can restrict adding/editing Zope Page Templates through the web using the standard Zope user/role permission mechanisms. • http://www.openwall.com/lists/oss-security/2021/05/21/1 http://www.openwall.com/lists/oss-security/2021/05/22/1 https://cyllective.com/blog/post/plone-authenticated-rce-cve-2021-32633 https://github.com/zopefoundation/Zope/commit/1f8456bf1f908ea46012537d52bd7e752a532c91 https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •