{"action":"Upgrade plone to 5.2.3 or later.","affected":[{"fixed":"5.2.3","introduced":"0"}],"component":"plone","cve_ids":["CVE-2020-28734"],"ecosystem":"PyPI","epss":0.01453,"exploited":false,"fixed_versions":["5.2.3"],"ghsa_id":"GHSA-wq6x-g685-w5f2","id":"tcs_01M5KG2PBYT306Y6V9FW73VM5A","modified_at":"2026-07-13T16:43:11.751432633Z","published_at":"2021-04-07T21:13:00Z","references":["https://osv.dev/vulnerability/GHSA-wq6x-g685-w5f2","https://nvd.nist.gov/vuln/detail/CVE-2020-28734","https://github.com/plone/Products.CMFPlone/issues/3209","https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt","https://github.com/advisories/GHSA-wq6x-g685-w5f2","https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2020-246.yaml","https://www.misakikata.com/codes/plone/python-en.html"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"GHSA-wq6x-g685-w5f2","url":"https://osv.dev/vulnerability/GHSA-wq6x-g685-w5f2"}],"summary":"Improper Restriction of XML External Entity Reference in Plone"}