PHP remote file inclusion vulnerability in includes/mailaccess/pop3.php in V-Webmail 1.5 through 1.6.4 allows remote attackers to execute arbitrary PHP code via a URL in the CONFIG[pear_dir] parameter.
https://www.exploit-db.com/exploits/1827
https://exchange.xforce.ibmcloud.com/vulnerabilities/26694
http://www.vupen.com/english/advisories/2006/1989