PHP is vulnerable to cross-site scripting attacks. A remote unauthenticated attacker could cause reflected cross-site scripting on the PHAR 404 error page via the URI of a request for a .phar file.
php.net/ChangeLog-5.php
php.net/ChangeLog-7.php
www.securityfocus.com/bid/102742
www.securityfocus.com/bid/104020
www.securitytracker.com/id/1040363
access.redhat.com/documentation/en-us/red_hat_software_collections/3/html/3.1_release_notes/chap-rhscl#sect-RHSCL-Changes-php
access.redhat.com/errata/RHSA-2018:1296
access.redhat.com/errata/RHSA-2019:2519
access.redhat.com/security/updates/classification/#moderate
bugs.php.net/bug.php?id=74782
lists.debian.org/debian-lts-announce/2018/01/msg00025.html
usn.ubuntu.com/3566-1/
usn.ubuntu.com/3600-1/
usn.ubuntu.com/3600-2/