{"id":"CVE-2021-41868","aliases":["GHSA-7g47-xxff-9p85","PYSEC-2026-434"],"url":"https://o3.security/vulnerability/CVE-2021-41868","summary":"Remote unauthenticated attackers able to upload files in Onionshare","details":"OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a non-public node when using the --receive functionality.","published":"2021-10-04T14:15:07.737Z","modified":"2026-08-07T16:57:44.075972Z","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":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"onionshare-cli","fixedVersion":"2.4"}],"fix":{"url":"https://github.com/onionshare/onionshare/pull/1404","label":"onionshare/onionshare#1404"},"references":[{"type":"FIX","url":"https://github.com/onionshare/onionshare/compare/v2.3.3...v2.4"},{"type":"EVIDENCE","url":"https://www.ihteam.net/advisory/onionshare/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41868"},{"type":"WEB","url":"https://github.com/onionshare/onionshare/issues/1396"},{"type":"WEB","url":"https://github.com/onionshare/onionshare/pull/1404"},{"type":"PACKAGE","url":"https://github.com/onionshare/onionshare"},{"type":"WEB","url":"https://www.ihteam.net/advisory/onionshare"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:44.075972Z"}}