CVE-2016-4309

Name: CVE-2016-4309
Creator: NVD / NIST
Published: 2016-06-30T17:59:02.813+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 9.42%

Last modified Jun 17, 2026

CVE-2016-4309 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 9.42% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

9.42%

94.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Getsymphony	Symphony	2.6.7

References

http://hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txtThird Party Advisory
http://packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/538714/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/91299Third Party Advisory, VDB Entry
https://github.com/symphonycms/symphony-2/commit/b329a14adc40868965076a77210452e396243dcdThird Party Advisory
https://www.exploit-db.com/exploits/39983/Exploit, Third Party Advisory, VDB Entry
http://hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txtThird Party Advisory
http://packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/538714/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/91299Third Party Advisory, VDB Entry
https://github.com/symphonycms/symphony-2/commit/b329a14adc40868965076a77210452e396243dcdThird Party Advisory
https://www.exploit-db.com/exploits/39983/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Jun 30, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4309?

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.

How severe is CVE-2016-4309?

CVE-2016-4309 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 9.42% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4309?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST