Security advisory

{
  "id": "c280e8c823319d7ee89cd5c2e931c2fddec22cecd2d19160d06ca5851eef861a",
  "url": "https://osv.dev/vulnerability/CVE-2020-6804",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-6804",
    "summary": "A reflected XSS vulnerability exists within the gateway, allowing an attacker to craft a specialized URL which could steal the user's authentication token. When combined with CVE-2020-6803, an attacker could fully compromise the system.",
    "evidence": "osv:CVE-2020-6804",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-6804",
      "aliases": [
        "CVE-2020-6804"
      ],
      "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/WebThingsIO/gateway",
              "type": "GIT",
              "events": [
                {
                  "introduced": "241ffd6b6893c87e4cee5c717ebe46b6f82ea058"
                },
                {
                  "fixed": "6b1f261caeb110283f464745f8696fb84ef6c3d9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mozilla:webthings_gateway:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.3.0"
                      },
                      {
                        "fixed": "0.12.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-6804.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:37.530234723Z",
      "provider": "osv",
      "references": [
        "https://github.com/mozilla-iot/gateway/pull/2446"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-6804",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384442,
  "published_at": "2020-02-28T23:15:11.543+00:00"
}