CVE-2016-4309
Session fixation vulnerability in Symphony CMS 2.6.7, when session.use_only_cookies is disabled,...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2016-4309- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.6 High
AV:N/AC:H/Au:N/C:C/I:C/A:C - Weakness
- CWE-362
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2016-4309- Updated
- 2026-11-02
EUVDEUVD-2016-5309 No score
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.
- Record
EUVD-2016-5309- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rgfr-7g9m-xpr3
Session fixation vulnerability in Symphony CMS 2.6.7, when session.use_only_cookies is disabled,...
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.
- Record
GHSA-rgfr-7g9m-xpr3- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2016-4309- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Symphony CMS 2.6.7 - Session Fixation | 2016-06-20 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-4309 is a high vulnerability (CVSS 7.5) in Getsymphony Symphony, published June 30, 2016. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 10.2%, the 95th percentile. No source names a fixed version.
References
exploit-db.com/exploits/39983
securityfocus.com/bid/91299
hyp3rlinx.altervista.org/advisories/SYMPHONY-CMS-SESSION-FIXATION.txt
github.com/symphonycms/symphony-2/commit/b329a14adc40868965076a77210452e396243dcd
packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.html
nvd.nist.gov/vuln/detail/CVE-2016-4309