Security advisory

{
  "id": "5add93f1294639cdbea8d28d51ce511f699ef067dbb58015d2b431574bab3e16",
  "url": "https://osv.dev/vulnerability/CVE-2021-23654",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23654",
    "summary": "This affects all versions of package html-to-csv. When there is a formula embedded in a HTML page, it gets accepted without any validation and the same would be pushed while converting it into a CSV file. Through this a malicious actor can embed or generate a malicious link or execute commands via CSV files.",
    "evidence": "osv:CVE-2021-23654",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-23654",
      "aliases": [
        "CVE-2021-23654",
        "GHSA-fwf6-rw69-hhj4",
        "PYSEC-2021-866",
        "SNYK-PYTHON-HTMLTOCSV-1582784"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hanwentao/html2csv",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "e6da07a89dc804ec6f56f226f6de42f7c88b39d6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:html-to-csv_project:html-to-csv:*:*:*:*:*:python:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.1.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23654.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:32.553037307Z",
      "provider": "osv",
      "references": [
        "https://github.com/hanwentao/html2csv/blob/master/html2csv/converter.py",
        "https://snyk.io/vuln/SNYK-PYTHON-HTMLTOCSV-1582784"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-23654",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385528,
  "published_at": "2021-11-26T20:15:07.393+00:00"
}