An issue was discovered in phpMyAdmin 4.8.x before 4.8.2 in which an attacker can include (view and potentially execute) files on the server. The vulnerability comes from a portion of code where pages are redirected and loaded within phpMyAdmin and an improper test for whitelisted pages. An attacker must be authenticated except in the \$cfg'AllowArbitraryServer' = true\ case (where an attacker can specify any host he/she is already in control of and execute arbitrary code on phpMyAdmin) and the \$cfg'ServerDefault' = 0\ case (which bypasses the login requirement and runs the vulnerable code without any authentication).