{"id":"CVE-2020-28736","aliases":["GHSA-2c8c-84w2-j38j","PYSEC-2020-248","PYSEC-2026-2879","PYSEC-2026-2882","PYSEC-2026-2885","PYSEC-2026-735"],"url":"https://o3.security/vulnerability/CVE-2020-28736","summary":"Improper Restriction of XML External Entity Reference in Plone","details":"Plone before 5.2.3 allows XXE attacks via a feature that is protected by an unapplied permission of plone.schemaeditor.ManageSchemata (therefore, only available to the Manager role).","published":"2020-12-30T19:15:13.403Z","modified":"2026-07-13T16:43:28.446541636Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"plone","fixedVersion":"5.2.3"},{"ecosystem":"PyPI","name":"plone-app-event","fixedVersion":"3.2.10"},{"ecosystem":"PyPI","name":"plone-app-theming","fixedVersion":"4.1.6"},{"ecosystem":"PyPI","name":"plone-app-dexterity","fixedVersion":"2.6.8"},{"ecosystem":"PyPI","name":"plone-supermodel","fixedVersion":"1.6.3"}],"fix":null,"references":[{"type":"WEB","url":"https://www.misakikata.com/codes/plone/python-en.html"},{"type":"ADVISORY","url":"https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt"},{"type":"FIX","url":"https://github.com/plone/Products.CMFPlone/issues/3209"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-13T16:43:28.446541636Z"}}