[Plone] Incorrect Permission Assignment for Critical Resource in 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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-33509
• https://plone.org/security/hotfix/20210518/writing-arbitrary-files-via-docutils-and-python-script
• http://www.openwall.com/lists/oss-security/2021/05/22/1
• https://github.com/advisories/GHSA-hm2p-fhwx-9285