{"id":"PYSEC-2026-736","summary":"Improper Restriction of XML External Entity Reference in Plone","details":"Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.","aliases":["CVE-2020-28734","GHSA-wq6x-g685-w5f2","PYSEC-2020-246"],"modified":"2026-07-06T08:11:23.297418134Z","published":"2026-07-02T14:13:09.907843Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28734"},{"type":"WEB","url":"https://github.com/plone/Products.CMFPlone/issues/3209"},{"type":"WEB","url":"https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-wq6x-g685-w5f2"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2020-246.yaml"},{"type":"WEB","url":"https://www.misakikata.com/codes/plone/python-en.html"},{"type":"PACKAGE","url":"https://pypi.org/project/plone-supermodel"}],"affected":[{"package":{"name":"plone-supermodel","ecosystem":"PyPI","purl":"pkg:pypi/plone-supermodel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.3"}]}],"versions":["1.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0b1","1.0b2","1.0b3","1.0b4","1.0b5","1.0b6","1.0b7","1.0b8","1.1","1.1.1","1.1.2","1.1.3","1.1.4","1.2.0","1.2.1","1.2.2","1.2.3","1.2.4","1.2.5","1.2.6","1.2.7","1.3.0","1.3.1","1.3.2","1.3.3","1.3.4","1.4.0","1.4.1","1.5.0","1.6.0","1.6.1","1.6.2"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/plone-supermodel/PYSEC-2026-736.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}