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Vulnerability record · CVE-2021-33509 · published 21 May 2021

CVE-2021-33509: Plone incorrect permission assignment vulnerability

Plone · Plone

Plone through 5.2.4 allows remote authenticated managers to perform disk I/O via crafted keyword arguments to the ReStructuredText transform in a Python script.

9.9 CVSS 3.1 Critical EPSS 2.0% · top 20.3% CWE-732 · Incorrect permission assignment
9.9CVSS 3.1 base score, v2 8.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Plone through 5.2.4 allows remote authenticated managers to perform disk I/O via crafted keyword arguments to the ReStructuredText transform in a Python script.

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

Affected products

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/05/22/1 Mailing ListThird Party Advisory
https://plone.org/security/hotfix/20210518/writing-arbitrary-files-via-docutils-and-python-script Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/05/22/1 Mailing ListThird Party Advisory
https://plone.org/security/hotfix/20210518/writing-arbitrary-files-via-docutils-and-python-script Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-33509), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.