Medium severity5.9NVD Advisory· Published Nov 3, 2021· Updated Jun 17, 2026
CVE-2021-38502
CVE-2021-38502
Description
Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authenticated session to execute SMTP commands chosen by the MITM. If an unprotected authentication method was configured, the MITM could obtain the authentication credentials, too. This vulnerability affects Thunderbird < 91.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <91.2
- (no CPE)range: <91.2
- (no CPE)range: unspecified
- osv-coords4 versionspkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.3pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP2pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP3
< 91.4.0-lp152.2.52.1+ 3 more
- (no CPE)range: < 91.4.0-lp152.2.52.1
- (no CPE)range: < 91.4.0-8.45.2
- (no CPE)range: < 91.4.0-8.45.2
- (no CPE)range: < 91.4.0-8.45.2
Patches
Vulnerability mechanics
References
4- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- lists.debian.org/debian-lts-announce/2022/01/msg00001.htmlnvdMailing ListThird Party Advisory
- www.debian.org/security/2022/dsa-5034nvdIssue TrackingThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2021-47/nvdVendor Advisory
News mentions
0No linked articles in our index yet.