{"id":"CVE-2016-4309","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-4309","generatedAt":"2026-10-28T03:22:24.674Z","title":"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.","description":"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.","published":"2016-06-30T17:59:03.000Z","lastModified":"2026-06-17T00:47:20.000Z","status":"Modified","sourceIdentifier":"cret@cert.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-362"],"affected":["getsymphony/symphony"],"epss":{"score":0.1022,"percentile":0.95642,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2016-06-20","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":39983,"kind":"exploit","title":"Symphony CMS 2.6.7 - Session Fixation","url":"https://www.exploit-db.com/exploits/39983","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/39983.txt","file":"exploits/php/webapps/39983.txt","published":"2016-06-20","added":"2016-06-20","updated":"2016-06-20","author":"hyp3rlinx","type":"webapps","platform":"php","port":80,"verified":false,"codes":["CVE-2016-4309"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comsymphony-2.6.7.zip","screenshotUrl":null,"referenceUrl":"http://hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txt"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 10.2%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-24T00:00:00.000Z","detail":{"to":0.1022,"from":0.09421,"percentile":0.9551},"summary":"EPSS moved from 9.4% to 10.2% probability of exploitation in the next thirty days."}],"references":[{"url":"http://hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txt","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"http://www.securityfocus.com/archive/1/538714/100/0/threaded","tags":["Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"http://www.securityfocus.com/bid/91299","tags":["Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"https://github.com/symphonycms/symphony-2/commit/b329a14adc40868965076a77210452e396243dcd","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.exploit-db.com/exploits/39983/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"http://hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txt","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/538714/100/0/threaded","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/91299","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/symphonycms/symphony-2/commit/b329a14adc40868965076a77210452e396243dcd","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/39983/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-4309","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}