Security advisory

{
  "id": "8a44c7cb93fe30855c120b04896b143c4e9ecd714f6918c72d13983fa0ceb06e",
  "url": "https://osv.dev/vulnerability/CVE-2021-41559",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41559",
    "summary": "Silverstripe silverstripe/framework 4.8.1 has a quadratic blowup in Convert::xml2array() that enables a remote attack via a crafted XML document.",
    "evidence": "osv:CVE-2021-41559",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-41559",
      "aliases": [
        "BIT-silverstripe-2021-41559",
        "CVE-2021-41559",
        "GHSA-9fmg-89fx-r33w"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/silverstripe/silverstripe-framework",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "794640247bde7a20c0bebec02cd4d5ab6c9ad0a0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:silverstripe:silverstripe:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.10.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.10.8",
            "4.10.7",
            "4.10.6",
            "4.10.5",
            "4.10.4",
            "4.10.3",
            "4.10.2",
            "4.10.1",
            "4.10.0-beta1",
            "4.9.0-beta1",
            "4.9.0-alpha1",
            "4.8.0-beta1",
            "4.7.0-beta1",
            "4.6.0-beta1",
            "4.1.0-rc1",
            "4.0.0-beta3",
            "4.0.0-beta2",
            "4.0.0-beta1",
            "4.0.0-alpha7",
            "4.0.0-alpha6",
            "4.0.0-alpha4",
            "4.0.0-alpha3",
            "4.0.0-alpha2",
            "4.0.0-alpha1",
            "3.0.0-rc1",
            "3.0.0-beta3",
            "3.0.0-beta2",
            "3.0.0-beta1",
            "3.0.0-alpha2",
            "3.0.0-alpha1",
            "2.2.2-rc1",
            "2.3.0-rc1",
            "2.2.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41559.json"
          }
        }
      ],
      "modified": "2026-10-24T10:50:42.875015122Z",
      "provider": "osv",
      "references": [
        "https://github.com/silverstripe/silverstripe-framework/releases",
        "https://www.silverstripe.org/download/security-releases/",
        "https://www.silverstripe.org/download/security-releases/cve-2021-41559"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:silverstripe:silverstripe:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "silverstripe:silverstripe",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "4.10.9"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-41559",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 442521,
  "published_at": "2022-06-28T22:15:07.87+00:00"
}