CVE-2020-28734: Improper Restriction of XML External Entity Reference in Plone

April 7, 2021 (updated October 17, 2024)

Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.

References

dist.plone.org/release/5.2.3/RELEASE-NOTES.txt
github.com/advisories/GHSA-wq6x-g685-w5f2
github.com/plone/Products.CMFPlone/issues/3209
github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2020-246.yaml
nvd.nist.gov/vuln/detail/CVE-2020-28734
www.misakikata.com/codes/plone/python-en.html

Code Behaviors & Features

Detect and mitigate CVE-2020-28734 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →