Session fixation vulnerability in Symphony CMS 2.6.7, when session.use_only_cookies is disabled, allows remote attackers to hijack web sessions via the PHPSESSID parameter.
hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txt
packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.html
www.securityfocus.com/archive/1/538714/100/0/threaded
www.securityfocus.com/bid/91299
github.com/symphonycms/symphony-2/commit/b329a14adc40868965076a77210452e396243dcd
www.exploit-db.com/exploits/39983/