phpMyAdmin 4.6.x before 4.6.3, when the environment lacks a PHP_SELF value, allows remote attackers to conduct cookie-attribute injection attacks via a crafted URI.
https://www.phpmyadmin.net/security/PMASA-2016-18/
https://security.gentoo.org/glsa/201701-32
https://github.com/phpmyadmin/phpmyadmin/commit/27caf5b46bd0890e576fea7bd7b166a0639fdf68