Apache Standard Taglibs before 1.2.3 allows remote attackers to execute arbitrary code or conduct external XML entity (XXE) attacks via a crafted XSLT extension in a (1) <x:parse> or (2) <x:transform> JSTL XML tag.
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com//security-alerts/cpujul2021.html
https://access.redhat.com/errata/RHSA-2016:1376
http://www.ubuntu.com/usn/USN-2551-1
http://www.securitytracker.com/id/1034934
http://www.securityfocus.com/bid/72809
http://www.securityfocus.com/archive/1/534772/100/0/threaded
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://rhn.redhat.com/errata/RHSA-2016-1841.html
http://rhn.redhat.com/errata/RHSA-2016-1840.html
http://rhn.redhat.com/errata/RHSA-2016-1839.html
http://rhn.redhat.com/errata/RHSA-2016-1838.html
http://rhn.redhat.com/errata/RHSA-2015-1695.html
http://lists.opensuse.org/opensuse-updates/2015-10/msg00033.html