Mozilla Thunderbird is vulnerable to cross-site scripting (XSS) attacks. This is because the content security policy (CSP) “sandbox” directive did not create a unique origin for the document, causing it to behave as if the “allow-same-origin” keyword were always specified allowing a malicious attacker to launch an attack from unsafe content.
www.securityfocus.com/bid/101059
www.securitytracker.com/id/1039465
access.redhat.com/errata/RHSA-2017:2831
access.redhat.com/errata/RHSA-2017:2885
access.redhat.com/security/updates/classification/#important
bugzilla.mozilla.org/show_bug.cgi?id=1396320
lists.debian.org/debian-lts-announce/2017/11/msg00000.html
security.gentoo.org/glsa/201803-14
www.debian.org/security/2017/dsa-3987
www.debian.org/security/2017/dsa-4014
www.mozilla.org/en-US/security/advisories/mfsa2017-23/
www.mozilla.org/security/advisories/mfsa2017-21/
www.mozilla.org/security/advisories/mfsa2017-22/
www.mozilla.org/security/advisories/mfsa2017-23/