{"id":"CVE-2021-38373","aliases":["DEBIAN-CVE-2021-38373","EUVD-2021-24826","GHSA-rc8g-gfxp-864v","UBUNTU-CVE-2021-38373"],"status":"published","title":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext...","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00527,"percentile":0.45154,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-319","CWE-77"],"published":"2021-08-10T14:51:25Z","modified":"2026-10-24T10:30:51Z","fixes":[{"ecosystem":"Debian:12","package":"ksmtp","fixed_in":["21.12.3-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"ksmtp","fixed_in":["21.12.3-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"ksmtp","fixed_in":["21.12.3-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"ksmtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"21.12.3-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"ksmtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"21.12.3-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"ksmtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"21.12.3-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"kmailtransport","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["17.04.3-0ubuntu1","17.08.3-0ubuntu2","17.08.3-0ubuntu3","17.12.2-0ubuntu1","17.12.3-0ubuntu3","17.12.3-0ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"ksmtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["17.12.2-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"kmailtransport","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["19.04.3-0ubuntu1","19.04.3-0ubuntu2","19.12.3-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"ksmtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["19.04.3-0ubuntu1","19.04.3-0ubuntu2","19.12.3-0ubuntu1","19.12.3-0ubuntu2"]}],"products":[{"vendor":"kde","product":"kmail"}],"references":[{"url":"https://nostarttls.secvuln.info","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://bugs.kde.org/show_bug.cgi?id=423423","tags":["x_refsource_MISC","x_transferred","Mailing List","Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38373"},{"url":"https://github.com/advisories/GHSA-rc8g-gfxp-864v"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-38373","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-38373","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-38373","tags":["report"]},{"url":"https://kde.org/info/security/advisory-20211118-1.txt","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-38373","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2021-08-10T14:51:25Z","modified":"2024-08-04T01:37:16.503Z","updated_at":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-24826","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2021-08-10T14:51:25Z","modified":"2024-08-04T01:37:16Z","updated_at":"2026-11-03T03:24:25.244479Z"}],"ghsa":[{"id":"GHSA-rc8g-gfxp-864v","title":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext...","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2022-05-24T19:10:34Z","modified":"2023-01-30T05:01:18Z","cwes":["CWE-77"],"updated_at":"2026-11-02T14:46:22.963176Z"}],"nvd":[{"id":"CVE-2021-38373","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2021-08-10T15:15:08.39Z","modified":"2026-06-17T04:01:58.297Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-77","CWE-319"],"updated_at":"2026-11-02T14:06:56.943671Z"}],"osv":[{"id":"CVE-2021-38373","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2021-08-10T15:15:08.39Z","modified":"2026-10-24T10:30:51.802008686Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.843843Z"},{"id":"DEBIAN-CVE-2021-38373","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2021-08-10T15:15:08.39Z","modified":"2026-10-23T18:03:31.892534485Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:35.521549Z"},{"id":"UBUNTU-CVE-2021-38373","description":"In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.","status":"published","published":"2021-08-10T15:15:00Z","modified":"2026-04-22T12:59:45.395996Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:28.526929Z"}]}}