Security advisory

{
  "id": "bb3efbf944db6c4a4306f644aa3f7ac7592fae03de1bd9df5c7f78a9a1a8cd12",
  "url": "https://osv.dev/vulnerability/CVE-2019-10905",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-10905",
    "summary": "Parsedown before 1.7.2, when safe mode is used and HTML markup is disabled, might allow attackers to execute arbitrary JavaScript code if a script (already running on the affected page) executes the contents of any element with a specific class. This occurs because spaces are permitted in code block infostrings, which interferes with the intended behavior of a single class name beginning with the language- substring.",
    "evidence": "osv:CVE-2019-10905",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-10905",
      "aliases": [
        "CVE-2019-10905",
        "GHSA-62m3-fc7f-jpp8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/erusev/parsedown",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d60bcdc46978357759ecb13cb4b078da783f8faf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:parsedown:parsedown:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.7.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d60bcdc46978357759ecb13cb4b078da783f8faf"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "1.7.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.7.1",
            "1.7.0",
            "1.6.4",
            "1.6.3",
            "1.6.2",
            "1.6.1",
            "1.6.0",
            "1.5.4",
            "1.5.3",
            "1.5.2",
            "1.5.1",
            "1.5.0",
            "1.4.5",
            "1.4.4",
            "1.4.3",
            "1.4.2",
            "1.4.1",
            "1.4.0",
            "1.3.0",
            "1.2.0",
            "1.1.4",
            "1.1.3",
            "1.1.2",
            "1.1.1",
            "1.1.0",
            "1.0.1",
            "1.0.0",
            "1.0.0-rc.5",
            "1.0.0-rc.4",
            "1.0.0-rc.3",
            "1.0.0-rc.2",
            "1.0.0-rc.1",
            "0.9.4",
            "0.9.3",
            "0.9.2",
            "0.9.1",
            "0.9.0",
            "0.8.3",
            "0.8.2",
            "0.8.1",
            "0.8.0",
            "0.7.7",
            "0.7.6",
            "0.7.5",
            "0.7.4",
            "0.7.3",
            "0.7.2",
            "0.7.1",
            "0.7.0",
            "0.6.0",
            "0.5.0",
            "0.4.8",
            "0.4.7",
            "0.4.6",
            "0.4.5",
            "0.4.4",
            "0.4.3",
            "0.4.2",
            "0.4.1",
            "0.4.0",
            "0.3.0",
            "0.2.1",
            "0.2.0",
            "0.1.5",
            "0.1.4",
            "0.1.3",
            "0.1.2",
            "0.1.1",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-10905.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:36.106717883Z",
      "provider": "osv",
      "references": [
        "https://github.com/erusev/parsedown/releases/tag/1.7.2",
        "https://github.com/erusev/parsedown/issues/699"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-10905",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382626,
  "published_at": "2019-04-06T20:29:00.447+00:00"
}