Security advisory

{
  "id": "a703657cb8b70aa23612db4d9434122571136307eb68f0aa6fb822bfad3771fe",
  "url": "https://osv.dev/vulnerability/CVE-2021-40902",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-40902",
    "summary": "flatCore-CMS version 2.0.8 is affected by Cross Site Scripting (XSS) in the \"Create New Page\" option through the index page.",
    "evidence": "osv:CVE-2021-40902",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-40902",
      "aliases": [
        "CVE-2021-40902"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/flatcore/flatcore-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d615797b3faac3731b09611972f01d12ebaa1d69"
                },
                {
                  "last_affected": "d615797b3faac3731b09611972f01d12ebaa1d69"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:flatcore:flatcore-cms:2.0.8:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.8"
                      },
                      {
                        "last_affected": "2.0.8"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.8",
            "v2.0.8"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40902.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:56.855259616Z",
      "provider": "osv",
      "references": [
        "https://github.com/flatCore/flatCore-CMS/issues/57"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-40902",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386512,
  "published_at": "2022-06-13T13:15:09.797+00:00"
}