IcedTea-Web before 1.5.3 and 1.6.x before 1.6.1 does not properly determine the origin of unsigned applets, which allows remote attackers to bypass the approval process or trick users into approving applet execution via a crafted web page.
lists.opensuse.org/opensuse-security-announce/2015-09/msg00019.html
mail.openjdk.java.net/pipermail/distro-pkg-dev/2015-September/033546.html
rhn.redhat.com/errata/RHSA-2016-0778.html
www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.securitytracker.com/id/1033780
www.ubuntu.com/usn/USN-2817-1
bugzilla.redhat.com/show_bug.cgi?id=1233697
lists.fedoraproject.org/pipermail/package-announce/2015-September/167120.html
lists.fedoraproject.org/pipermail/package-announce/2015-September/167130.html