Security advisory

{
  "id": "f63fea6fe1c823e59dbd2b5588e77bd8b25d08b7662d2303babf35287cbe9fd6",
  "url": "https://osv.dev/vulnerability/CVE-2017-0883",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-0883",
    "summary": "Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.",
    "evidence": "osv:CVE-2017-0883",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2017-0883",
      "aliases": [
        "CVE-2017-0883"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "36750094f8b1a2f3bb24ac46348a639fc6197f9c"
                },
                {
                  "introduced": "6849d7235ef1acd2293382cc170a82c55c6bb3ba"
                },
                {
                  "last_affected": "6849d7235ef1acd2293382cc170a82c55c6bb3ba"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "9.0.54"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:10.0.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.0.2"
                      },
                      {
                        "last_affected": "10.0.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "10.0.2",
            "v10.0.2",
            "v9.0.54",
            "v9.0.54RC1",
            "v9.0.52",
            "v9.0.52RC1",
            "v9.0.51",
            "v9.0.50",
            "v9.0.2",
            "v9.0.2RC2",
            "v9.0.2RC1",
            "v9.0.1RC2",
            "v9.0.1",
            "v9.0.1RC1",
            "v9.0.1beta",
            "v9.0.0",
            "v9.0.0RC3",
            "v9.0.0RC2",
            "v9.0.0RC1",
            "v9.0.0beta2",
            "v9.0beta1",
            "v8.2RC1",
            "v8.2beta1",
            "v8.1RC2",
            "v8.1.0beta2",
            "v8.1.0beta1",
            "v8.1.0alpha2",
            "v8.1.0alpha1",
            "v8.0.0",
            "v8.0.0RC2",
            "v8.0.0RC1",
            "v8.0.0beta2",
            "v8.0.0beta1",
            "v8.0.0alpha2",
            "v8.0.0alpha1",
            "v7.0.0beta1",
            "v7.0.0alpha2",
            "v6.0.0RC2",
            "v6.0.0RC1",
            "v6.0.0beta5",
            "v6.0.0beta4",
            "v6.0.0beta3",
            "v6.0.0beta2",
            "v6.0.0alpha2",
            "v5.0.0",
            "v5.0.0RC3",
            "v5.0.0RC2",
            "v5.0.0RC1",
            "v5.0.0beta2",
            "v5.0.0beta1",
            "v5.0.0alpha1",
            "v4.5.0",
            "v4.5.0RC3",
            "v4.5.0RC2",
            "v4.5.0RC1",
            "v4.5.0beta4",
            "v4.5.0beta3",
            "v4.0.6",
            "v4.0.5",
            "v4.0.4",
            "v4.0.1",
            "v4.0.0",
            "v4.0.0RC2",
            "v4.0.0RC",
            "v4.0.0beta",
            "v3.0",
            "v1.0.0beta1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-0883.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:21.004483420Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/169680",
        "https://nextcloud.com/security/advisory/?id=nc-sa-2017-001"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-0883",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430399,
  "published_at": "2017-04-05T20:59:00.197+00:00"
}