High severity7.5NVD Advisory· Published Jul 9, 2020· Updated Jun 17, 2026
CVE-2020-12398
CVE-2020-12398
Description
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 < 68.9.0.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
11- osv-coords4 versionspkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP2pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.1
< 68.9.0-3.85.2+ 3 more
- (no CPE)range: < 68.9.0-3.85.2
- (no CPE)range: < 68.9.0-3.85.2
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 68.9.0-lp151.2.41.1
unspecified+ 2 more
- (no CPE)range: unspecified
- (no CPE)range: <68.9.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <68.9.0
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*+ 3 more
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Patches
Vulnerability mechanics
References
3- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- usn.ubuntu.com/4421-1/nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2020-22/nvdVendor Advisory
News mentions
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