HIGH8.8
PYSEC-2026-2880
Improper Restriction of XML External Entity Reference in Plone
Quick fix
PYSEC-2026-2880 — plone-app-dexterity: upgrade to the fixed version with the command below.
pip install --upgrade 'plone-app-dexterity>=2.6.8'Details
Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.
Are you affected?
Enter the version of the package you're using.
Affected packages
PyPI/plone-app-dexterity
Introduced in:
0Fixed in: 2.6.8Fix
pip install --upgrade 'plone-app-dexterity>=2.6.8'References
- https://nvd.nist.gov/vuln/detail/CVE-2020-28734[ADVISORY]
- https://github.com/plone/Products.CMFPlone/issues/3209[WEB]
- https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt[WEB]
- https://github.com/advisories/GHSA-wq6x-g685-w5f2[ADVISORY]
- https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2020-246.yaml[WEB]
- https://www.misakikata.com/codes/plone/python-en.html[WEB]
- https://pypi.org/project/plone-app-dexterity[PACKAGE]