Direct static code injection vulnerability in Ultimate PHP Board (UPB) 1.9.6 and earlier allows remote authenticated administrators to execute arbitrary PHP code via multiple unspecified "configuration fields" in (1) admin_chatconfig.php, (2) admin_configcss.php, (3) admin_config.php, or (4) admin_config2.php, which are stored as configuration settings.  NOTE: this issue can be exploited by remote attackers by leveraging other vulnerabilities in UPB.