{"id":"CVE-2022-36071","aliases":["GHSA-54qx-8p8w-xhg8","GO-2022-0964"],"url":"https://o3.security/vulnerability/CVE-2022-36071","summary":"Recovery codes abuse in SFTPGo","details":"SFTPGo is configurable SFTP server with optional HTTP/S, FTP/S and WebDAV support. SFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a secondary authentication factor. Because TOTPs are often configured on mobile devices that can be lost, stolen or damaged, SFTPGo also supports recovery codes. These are a set of one time use codes that can be used instead of the TOTP. In SFTPGo versions from version 2.2.0 to 2.3.3 recovery codes can be generated before enabling two-factor authentication. An attacker who knows the user's password could potentially generate some recovery codes and then bypass two-factor authentication after it is enabled on the account at a later time. This issue has been fixed in version 2.3.4. Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.","published":"2022-09-02T17:15:12Z","modified":"2026-08-12T03:51:24.487969650Z","cvss":{"score":8.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"},"epss":{"score":0.00523,"percentile":0.42686,"asOf":"2026-09-09"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/drakkan/sftpgo/v2","fixedVersion":"2.3.4"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36071.json"},{"type":"ADVISORY","url":"https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-36071"},{"type":"REPORT","url":"https://github.com/drakkan/sftpgo/issues/965"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:24.487969650Z"}}