Security advisory

{
  "id": "c675ad1f5a84cada4410fc2185269f2edde5f5378fcd640086dfc0fa5e7bf58a",
  "url": "https://osv.dev/vulnerability/CVE-2020-8133",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8133",
    "summary": "A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.",
    "evidence": "osv:CVE-2020-8133",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-8133",
      "aliases": [
        "CVE-2020-8133"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d7998fa123ae97be6abb31328ca1382a8a5ec31b"
                },
                {
                  "last_affected": "d7998fa123ae97be6abb31328ca1382a8a5ec31b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:19.0.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "19.0.1"
                      },
                      {
                        "last_affected": "19.0.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "19.0.1",
            "v19.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8133.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:52.292091208Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/661051%2C",
        "https://nextcloud.com/security/advisory/?id=NC-SA-2020-038",
        "https://hackerone.com/reports/661051"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8133",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437661,
  "published_at": "2020-11-09T15:15:13.367+00:00"
}