Silverstripe: XSS in breadcrumbs in page list view

{
  "id": "26adae9e473f5ece2ae8b70f92d580e96515fc82725f472e6766900795ba02d8",
  "url": "https://osv.dev/vulnerability/CVE-2026-54717",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Silverstripe: XSS in breadcrumbs in page list view",
    "summary": "Silverstripe CMS is an open source content management system. Prior to 6.2.1, page breadcrumbs in the CMS are vulnerable to cross-site scripting when viewed using the page list view, because page titles are rendered into the breadcrumb trail without being escaped. This issue is fixed in 6.2.1.",
    "evidence": "osv:CVE-2026-54717",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-54717",
      "aliases": [
        "CVE-2026-54717",
        "GHSA-w3cp-g2pf-65wh"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/silverstripe/silverstripe-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "62f9912baa18c80304f3fa8b6eca71bb5dc2d21e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "6.2.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "62f9912baa18c80304f3fa8b6eca71bb5dc2d21e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "62f9912baa18c80304f3fa8b6eca71bb5dc2d21e"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "6.2.1"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "6.2.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.2.0-rc1",
            "6.2.0",
            "6.2.0-beta1",
            "6.1.0-rc1",
            "6.1.0-beta1",
            "6.0.0-alpha1",
            "5.2.0-rc1",
            "5.2.0-beta1",
            "5.2.0",
            "5.1.0-beta1",
            "5.0.0-beta1",
            "5.0.0-alpha1",
            "4.10.0-rc1",
            "4.10.0-beta1",
            "4.10.0",
            "4.9.0-alpha1",
            "4.8.0-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-alpha5",
            "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",
            "HamishsTesta2",
            "3.0.0-pr1",
            "2.3.0-rc1",
            "2.2.2-rc1",
            "2.2.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54717.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.901366664Z",
      "provider": "osv",
      "references": [
        "https://github.com/silverstripe/silverstripe-cms/releases/tag/6.2.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54717.json",
        "https://github.com/silverstripe/silverstripe-cms/security/advisories/GHSA-w3cp-g2pf-65wh",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54717",
        "https://github.com/silverstripe/silverstripe-cms/commit/62f9912baa18c80304f3fa8b6eca71bb5dc2d21e",
        "https://github.com/silverstripe/silverstripe-cms/pull/3175"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54717.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54717",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519518,
  "published_at": "2026-08-06T20:27:17.974+00:00"
}