{"id":"CVE-2021-23654","aliases":["GHSA-fwf6-rw69-hhj4","PYSEC-2021-866","SNYK-PYTHON-HTMLTOCSV-1582784"],"url":"https://o3.security/vulnerability/CVE-2021-23654","summary":"Improper Neutralization of Formula Elements in a CSV File in html-2-csv","details":"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.","published":"2021-11-26T20:15:07.393Z","modified":"2026-07-09T10:12:06.672211Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01205,"percentile":0.65475,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"PyPI","name":"html-to-csv","fixedVersion":null}],"fix":null,"references":[{"type":"EVIDENCE","url":"https://github.com/hanwentao/html2csv/blob/master/html2csv/converter.py"},{"type":"EVIDENCE","url":"https://snyk.io/vuln/SNYK-PYTHON-HTMLTOCSV-1582784"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T10:12:06.672211Z"}}