Security advisory

{
  "id": "867375afae662a8a7d244a7b60f471bad504a7b25d3d2e46dc5d19bcaee83956",
  "url": "https://osv.dev/vulnerability/CVE-2020-28736",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-28736",
    "summary": "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).",
    "evidence": "osv:CVE-2020-28736",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-28736",
      "aliases": [
        "CVE-2020-28736",
        "GHSA-2c8c-84w2-j38j",
        "PYSEC-2020-248",
        "PYSEC-2026-2879",
        "PYSEC-2026-2882",
        "PYSEC-2026-2885",
        "PYSEC-2026-735"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/plone/plone",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f60eabc07798a9d4418d8752a528d5dc2983c8d3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "5.2.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.2.2",
            "5.2.1",
            "5.2.0",
            "5.2rc5",
            "5.2rc4",
            "5.2rc3",
            "5.2rc2",
            "5.2rc1",
            "5.2b1",
            "5.2a2",
            "5.2a1",
            "5.1rc1",
            "5.1b4",
            "5.1b3",
            "5.1b2",
            "5.1b1",
            "5.1a2",
            "5.1a1",
            "5.0.2",
            "5.0.1",
            "5.0",
            "5.0rc3",
            "5.0rc2",
            "5.0rc1",
            "5.0b4",
            "5.0b3",
            "5.0b1",
            "5.0a3",
            "5.0a2",
            "4.3.1",
            "4.3",
            "4.3b2",
            "4.3b1",
            "4.3a2",
            "4.3a1",
            "4.2b2",
            "4.2b1",
            "4.1.0",
            "4.2a2",
            "4.2a1",
            "4.1rc3",
            "4.1rc2",
            "4.1rc1",
            "4.1b2",
            "4.1b1",
            "4.1a3",
            "4.1a2",
            "4.1a1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28736.json"
          }
        }
      ],
      "modified": "2026-10-24T10:51:22.893118261Z",
      "provider": "osv",
      "references": [
        "https://www.misakikata.com/codes/plone/python-en.html",
        "https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt",
        "https://github.com/plone/Products.CMFPlone/issues/3209"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "plone:plone",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "5.2.3"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-28736",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 442572,
  "published_at": "2020-12-30T19:15:13.403+00:00"
}