Security advisory

{
  "id": "9ae683292f1b589c99a554dd4542f8e36d2f983fd790d5e0d2a11f5cf23420a1",
  "url": "https://osv.dev/vulnerability/CVE-2020-8127",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8127",
    "summary": "Insufficient validation in cross-origin communication (postMessage) in reveal.js version 3.9.1 and earlier allow attackers to perform cross-site scripting attacks.",
    "evidence": "osv:CVE-2020-8127",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-8127",
      "aliases": [
        "CVE-2020-8127",
        "GHSA-6vwx-mwp8-fh44"
      ],
      "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/hakimel/reveal.js",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "eaf3988311162697fdc0a25f4158eb9e2509f9d7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:revealjs:reveal.js:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.9.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.9.1",
            "3.9.0",
            "3.8.0",
            "3.7.0",
            "3.6.0",
            "3.5.0",
            "3.4.0",
            "3.3.0",
            "3.2.0",
            "3.1.0",
            "3.0.0",
            "2.6.2",
            "2.6.1",
            "2.6.0",
            "2.5.0",
            "2.4.0",
            "2.3.0",
            "2.2.0",
            "2.1.0",
            "2.0.0",
            "1.4.0",
            "1.3.0",
            "1.2.0",
            "1.1.0",
            "1.0.0",
            "0.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8127.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:24.928239097Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/691977"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8127",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431255,
  "published_at": "2020-02-28T20:15:11.537+00:00"
}