dDecrypted S/MIME parts hidden with CSS or the plaintext HTML tag can leak plaintext when included in a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.Referenceshttp://www.securityfocus.com/bid/104613https://security.gentoo.org/glsa/201811-13https://www.mozilla.org/security/advisories/mfsa2018-18/https://www.debian.org/security/2018/dsa-4244https://bugzilla.mozilla.org/show_bug.cgi?id=1464056https://bugzilla.mozilla.org/show_bug.cgi?id=1464667https://access.redhat.com/errata/RHSA-2018:2252https://lists.debian.org/debian-lts-announce/2018/07/msg00013.htmlhttps://access.redhat.com/errata/RHSA-2018:2251https://usn.ubuntu.com/3714-1/
