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. Untrusted users should not be assigned the Zope Manager role and adding/editing Zope Page Templates through the web should be restricted to trusted users only.

• CWE-22
• CWE-22

• http://www.openwall.com/lists/oss-security/2021/05/21/1Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/22/1Mailing List, Third Party Advisory
• https://cyllective.com/blog/post/plone-authenticated-rce-cve-2021-32633/Exploit, Third Party Advisory
• https://github.com/zopefoundation/Zope/commit/1f8456bf1f908ea46012537d52bd7e752a532c91Patch, Third Party Advisory
• https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/21/1Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/22/1Mailing List, Third Party Advisory
• https://cyllective.com/blog/post/plone-authenticated-rce-cve-2021-32633/Exploit, Third Party Advisory
• https://github.com/zopefoundation/Zope/commit/1f8456bf1f908ea46012537d52bd7e752a532c91Patch, Third Party Advisory
• https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36Third Party Advisory

Published

May 21, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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