EPSS
Percentile
55.9%
thunderbird is vulnerable to information disclosure. The security downgrade with IMAP STARTTLS leads to information disclosure.
access.redhat.com/errata/RHSA-2020:2616
access.redhat.com/security/updates/classification/#important
bugzilla.mozilla.org/show_bug.cgi?id=1613623
usn.ubuntu.com/4421-1/
www.mozilla.org/security/advisories/mfsa2020-22/