Yerba SACphp 6.3 and earlier allows remote attackers to bypass authentication and gain administrative access via a galleta[sesion] cookie that has a value beginning with 1:1: followed by a username.
https://www.exploit-db.com/exploits/6691
https://exchange.xforce.ibmcloud.com/vulnerabilities/45734
http://www.securityfocus.com/bid/31619