Security advisory

{
  "id": "3cecdc58248dff795309ab1ccf426a40d36bef02ee07788c9622b01da5697e57",
  "url": "https://osv.dev/vulnerability/CVE-2020-8181",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8181",
    "summary": "A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars.",
    "evidence": "osv:CVE-2020-8181",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-8181",
      "aliases": [
        "CVE-2020-8181"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/contacts",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "872e74b8ec7a67dd6db597ea4e742c3faa169c93"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.3.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.2.0",
            "v3.1.9",
            "v3.1.6",
            "v3.1.5",
            "v3.1.4",
            "v3.1.3",
            "v3.1.2",
            "v3.1.1",
            "v3.1.0",
            "v3.0.1",
            "v3.0.0",
            "v3.0.0-beta1",
            "v3.0.0-alpha1",
            "v2.1.6-beta",
            "v2.1.6",
            "v2.1.5",
            "v2.1.4",
            "v2.1.3",
            "v2.1.2",
            "v2.1.1",
            "v2.1.0",
            "v2.0.1",
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8181.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:18.861889251Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/808287%2C",
        "https://nextcloud.com/security/advisory/?id=NC-SA-2020-024"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8181",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429870,
  "published_at": "2020-07-10T16:15:11.703+00:00"
}