Provide references for CVE-2019-16993.
Where can I find more information about CVE-2019-16993?
References are available at: https://www.phpbb.com/community/viewtopic.php?t=2352606, https://www.phpbb.com/support/documents.php?mode=changelog&version=3#v317, https://github.com/phpbb/phpbb/commit/18abef716ecf42a35416444f3f84f5459d573789, https://lists.debian.org/debian-lts-announce/2019/09/msg00036.html, https://lists.debian.org/debian-lts-announce/2019/10/msg00006.html.