{"id":"CVE-2020-12398","details":"If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird \u003c 68.9.0.","modified":"2026-04-16T04:30:23.816485316Z","published":"2020-07-09T15:15:10.677Z","related":["SUSE-SU-2020:1591-1","SUSE-SU-2020:1591-2","openSUSE-SU-2020:0799-1","openSUSE-SU-2024:10601-1"],"references":[{"type":"ADVISORY","url":"https://usn.ubuntu.com/4421-1/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-22/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1613623"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12398.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"68.9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"19.10"}]},{"events":[{"introduced":"0"},{"last_affected":"20.04"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}