Session fixation vulnerability in onelook onebyone CMS allows remote attackers to hijack web sessions by setting a PHPSESSID cookie.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33497
http://www.securityfocus.com/archive/1/464884/100/0/threaded
http://www.majorsecurity.de/index_2.php?major_rls=major_rls39