Zope is an open-source web application server. This advisory extends the previous advisory at https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 with additional cases of TAL expression traversal vulnerabilities. Most Python modules are not available for using in TAL expressions that you can add through-the-web, for example in Zope Page Templates. This restriction avoids file system access, for example via the 'os' module. But some of the untrusted modules are available indirectly through Python modules that are available for direct use. By default, you need to have the Manager role to add or edit Zope Page Templates through the web. Only sites that allow untrusted users to add/edit Zope Page Templates through the web are at risk. The problem has been fixed in Zope 5.2.1 and 4.6.1. The workaround is the same as for https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36: 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.

The version of Plone installed on the remote host is 4.3.x prior to 5.2.5. It is, therefore, affected by the following vulnerabilities:

  - Plone CMS has a stored Cross-Site Scripting (XSS) vulnerability in the user fullname property and the file     upload functionality. (CVE-2021-3313)

  - Products.PluggableAuthService within Zope has an information disclosure vulnerability - everyone can list the names of     roles defined in the ZODB Role Manager plugin if the site uses this plugin. (CVE-2021-21336)

  - Products.GenericSetup within Zope has an information disclosure vulnerability - anonymous visitors may     view log and snapshot files generated by the Generic Setup Tool. (CVE-2021-21360)

  - Zope has a remote code execution vulnerability via a traversal in the TAL expressions. (CVE-2021-32633,     CVE-2021-32674)

  - The AccessControl module within Zope has a remote code execution via the use of unsafe classes in     permitted modules. (CVE-2021-32807)

  - Zope Products.CMFCore and Products.PluggableAuthService, as used in Plone and other products, allow     Reflected XSS. (CVE-2021-33507)

  - Plone allows XSS via a full name that is mishandled during rendering of the ownership tab of a content     item. (CVE-2021-33508)

  - Plone allows remote authenticated managers to perform disk I/O via crafted keyword arguments to the     ReStructuredText transform in a Python script. (CVE-2021-33509)

  - Plone allows remote authenticated managers to conduct SSRF attacks via an event ical URL, to read one line     of a file. (CVE-2021-33510)

  - Plone allows SSRF via the lxml parser. (CVE-2021-33511)

  - Plone allows stored XSS attacks (by a Contributor) by uploading an SVG or HTML document. (CVE-2021-33512)

  - Plone allows XSS via the inline_diff methods in Products.CMFDiffTool. (CVE-2021-33513)

  - An issue in Plone CMS allows an attacker to access sensitive information via the RSS feed portlet.
    (CVE-2021-33926)

  - In Plone, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag     in the description field (CVE-2021-35959)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number. Since a vendor hotfix (PloneHotfix20210518) may remediate this without a version upgrade, this plugin only reports when running in Paranoid mode.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Zope is an open-source web application server. This advisory extends the previous advisory at
    https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 with additional cases of
    TAL expression traversal vulnerabilities. Most Python modules are not available for using in TAL
    expressions that you can add through-the-web, for example in Zope Page Templates. This restriction avoids
    file system access, for example via the 'os' module. But some of the untrusted modules are available
    indirectly through Python modules that are available for direct use. By default, you need to have the
    Manager role to add or edit Zope Page Templates through the web. Only sites that allow untrusted users to
    add/edit Zope Page Templates through the web are at risk. The problem has been fixed in Zope 5.2.1 and
    4.6.1. The workaround is the same as for
    https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36: 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. (CVE-2021-32674)

ID	Name	Product	Family	Severity
329024	Plone 4.3.x < 5.2.5 Multiple Vulnerabilities (HF 20210518)	Nessus	Misc.	critical
418844	SCA: security update for Zope (GHSA-rpcg-f9q6-2mq6)	Tenable Cloud Security	SCA Checks	high
418844	SCA: security update for Zope (GHSA-rpcg-f9q6-2mq6)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2021-32674

high

Tenable Plugins

critical

high

high