It indicates an attacker attempted a Cross-Site Scripting attack against phpMyAdmin. phpMyAdmin is prone to a programming error that allows the "$cfg["ThemeManager"]" variable to be overwritten with user-supplied data. An attacker can leverage this vulnerability to execute arbitrary PHP code.
phpMyAdmin phpMyAdmin 2.6.4 -rc1 and earlier versions.
Compromise of the affected system.
Apply appropriate patch from the vendor or Upgrade to non-vulnerable version if available.