CVE-2021-32633 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/zopefoundation/Zope/commit/1f8456bf1f908ea46012537d52bd7e752a532c91 https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 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/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8