Security advisory

{
  "id": "67ce0b8745b2e878e263298cc29ed08f155f3b422af0ab2c8b7a6ce1bb5e48b4",
  "url": "https://osv.dev/vulnerability/CVE-2021-21402",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-21402",
    "summary": "Jellyfin is a Free Software Media System. In Jellyfin before version 10.7.1, with certain endpoints, well crafted requests will allow arbitrary file read from a Jellyfin server's file system. This issue is more prevalent when Windows is used as the host OS. Servers that are exposed to the public Internet are potentially at risk. This is fixed in version 10.7.1. As a workaround, users may be able to restrict some access by enforcing strict security permissions on their filesystem, however, it is recommended to update as soon as possible.",
    "evidence": "osv:CVE-2021-21402",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-21402",
      "aliases": [
        "CVE-2021-21402",
        "GHSA-wg4c-c9g9-rxhx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jellyfin/jellyfin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3dda25412c2090b6060e1467ce61681d950ee70f"
                },
                {
                  "fixed": "0183ef8e89195f420c48d2600bc0b72f6d3a7fd7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jellyfin:jellyfin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "10.7.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0183ef8e89195f420c48d2600bc0b72f6d3a7fd7"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3dda25412c2090b6060e1467ce61681d950ee70f"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v10.7.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v10.7.0",
            "v10.7.0-rc4",
            "v10.7.0-rc3",
            "v10.7.0-rc2",
            "v10.7.0-rc1",
            "v10.6.0",
            "v10.5.0",
            "v10.4.0",
            "v10.0.1",
            "v10.0.0",
            "v10.0.2",
            "v3.5.2-5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21402.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/jellyfin/jellyfin-web",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8e63b38a08c43e9e522341a77bc5b002a3234de5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jellyfin:jellyfin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "10.7.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v10.7.0",
            "v10.7.0-rc4",
            "v10.7.0-rc3",
            "v10.7.0-rc2",
            "v10.7.0-rc1",
            "v10.6.0",
            "v10.5.0",
            "v10.4.0",
            "v10.3.0-rc1",
            "v10.1.0",
            "v10.0.1",
            "v10.0.0",
            "v3.5.2-5",
            "v3.5.2-4",
            "v3.5.2-3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21402.json"
          }
        }
      ],
      "modified": "2026-10-24T10:50:06.793127047Z",
      "provider": "osv",
      "references": [
        "https://github.com/jellyfin/jellyfin/releases/tag/v10.7.1",
        "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-wg4c-c9g9-rxhx",
        "https://github.com/jellyfin/jellyfin/commit/0183ef8e89195f420c48d2600bc0b72f6d3a7fd7"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-21402",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441965,
  "published_at": "2021-03-23T20:15:13.12+00:00"
}