Security advisory

{
  "id": "a8429099bf0b012a349a53dfb7607896bb56934bdf1fe26f78c06f514c77f295",
  "url": "https://osv.dev/vulnerability/CVE-2020-8297",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8297",
    "summary": "Nextcloud Deck before 1.0.2 suffers from an insecure direct object reference (IDOR) vulnerability that permits users with a duplicate user identifier to access deck data of a previous deleted user.",
    "evidence": "osv:CVE-2020-8297",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-8297",
      "aliases": [
        "CVE-2020-8297"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/deck",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6a3655a45d1b8c9c05e0613e5f95d76ddc5c2135"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:deck:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.1",
            "v1.0.0",
            "v1.0.0-beta2",
            "v1.0.0-beta1",
            "v0.8.0",
            "v0.6.6",
            "v0.7.0",
            "v0.6.5",
            "v0.6.4",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.6.0-beta2",
            "v0.6.0-beta1",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.5.0-rc2",
            "v0.5.0-rc1",
            "v0.5.0-beta1",
            "v0.4.1",
            "v0.4.0",
            "v0.4.0-beta5",
            "v0.4.0-beta4",
            "v0.4.0-beta3",
            "v0.4.0-beta2",
            "v0.4.0-beta1",
            "v0.3.1",
            "v0.3.0",
            "v0.3.0-beta1",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8297.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:25.268087382Z",
      "provider": "osv",
      "references": [
        "https://nextcloud.com/security/advisory/?id=NC-SA-2021-007",
        "https://github.com/nextcloud/deck/pull/1976",
        "https://hackerone.com/reports/882258"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8297",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385335,
  "published_at": "2021-02-23T19:15:13.387+00:00"
}