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Vulnerability record · CVE-2021-32633 · published 21 May 2021

CVE-2021-32633: Plone path traversal vulnerability

Plone · Plone

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.

8.8 CVSS 3.1 High EPSS 1.9% · top 21.6% CWE-22 · Path traversal
8.8CVSS 3.1 base score, v2 6.5
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/05/21/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/22/1 Mailing ListThird Party Advisory
https://cyllective.com/blog/post/plone-authenticated-rce-cve-2021-32633/ ExploitThird Party Advisory
https://github.com/zopefoundation/Zope/commit/1f8456bf1f908ea46012537d52bd7e752a532c91 PatchThird Party Advisory
https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/21/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/22/1 Mailing ListThird Party Advisory
https://cyllective.com/blog/post/plone-authenticated-rce-cve-2021-32633/ ExploitThird Party Advisory
https://github.com/zopefoundation/Zope/commit/1f8456bf1f908ea46012537d52bd7e752a532c91 PatchThird Party Advisory
https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2000-0062Zope vulnerabilityThe DTML implementation in the Z Object Publishing Environment (Zope) allows remote attackers to conduct unauthorized activities.EPSS 2.2%9.9CVE-2021-33509Plone incorrect permission assignment vulnerabilityPlone through 5.2.4 allows remote authenticated managers to perform disk I/O via crafted keyword arguments to the ReStructuredText transform in a Pyt…EPSS 2.0%9.8CVE-2020-35190Plone missing authentication for critical function vulnerabilityThe official plone Docker images before version of 4.3.18-alpine (Alpine specific) contain a blank password for a root user. System using the plone d…EPSS 2.2%9.8CVE-2020-7941Plone vulnerabilityA privilege escalation issue in plone.app.contenttypes in Plone 4.3 through 5.2.1 allows users to PUT (overwrite) some content without needing write …EPSS 2.3%9.3CVE-2011-3587Zope p_ class remote command execution in PloneZope 2.12.x and 2.13.x, as shipped in Plone 4.0.x through 4.0.9, 4.1, and 4.2 through 4.2a2, contains an unspecified flaw tied to the p_ class in OFS…EPSS 78%analysed9.3CVE-2011-4030Plone cmfeditions permissions and access controls vulnerabilityThe CMFEditions component 2.x in Plone 4.0.x through 4.0.9, 4.1, and 4.2 through 4.2a2 does not prevent the KwAsAttributes classes from being publish…EPSS 2.0%8.8CVE-2021-33926Plone server-side request forgery (ssrf) vulnerabilityAn issue in Plone CMS v. 5.2.4, 5.2.3, 5.2.2, 5.2.1, 5.2.0, 5.1rc2, 5.1rc1, 5.1b4, 5.1b3, 5.1b2, 5.1a2, 5.1a1, 5.1.7, 5.1.6, 5.1.5, 5.1.4, 5.1.2, 5.1…EPSS 1.0%8.8CVE-2021-32674Zope path traversal vulnerabilityZope is an open-source web application server. This advisory extends the previous advisory at https://github.com/zopefoundation/Zope/security/advisor…EPSS 1.6%

Source: NIST National Vulnerability Database (record CVE-2021-32633), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.