Security advisory

{
  "id": "9db0c45c9ec7b9587cee503c89087afb46e937220e6f591d141ce671a785f889",
  "url": "https://osv.dev/vulnerability/CVE-2021-39183",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-39183",
    "summary": "Owncast is an open source, self-hosted live video streaming and chat server. In affected versions inline scripts are executed when Javascript is parsed via a paste action. This issue is patched in 0.0.9 by blocking unsafe-inline Content Security Policy and specifying the script-src. The worker-src is required to be set to blob for the video player.",
    "evidence": "osv:CVE-2021-39183",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-39183",
      "aliases": [
        "CVE-2021-39183",
        "GHSA-2hfj-cxw7-g45p",
        "GO-2022-0291"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/owncast/owncast",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7860fe78dc56dc5b2b6e11011dc1e842fff57890"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:owncast_project:owncast:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.0.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.0.8",
            "v0.0.7",
            "v0.0.6",
            "v0.0.5",
            "v0.0.4",
            "v0.0.3",
            "v0.0.2",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39183.json"
          }
        }
      ],
      "modified": "2026-10-20T11:12:21.715775245Z",
      "provider": "osv",
      "references": [
        "https://github.com/owncast/owncast/security/advisories/GHSA-2hfj-cxw7-g45p"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-39183",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387127,
  "published_at": "2021-12-14T20:15:07.49+00:00"
}