CVE-2016-4309

HIGH

Symphony CMS 2.6.7 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2016-4309. PoCs published by hyp3rlinx.

AI-analyzed exploit summary This is a detailed writeup describing a session fixation vulnerability in Symphony CMS v2.6.7. The vulnerability allows attackers to preset a user's PHPSESSID if session.use_only_cookies is disabled, as the application does not regenerate session IDs upon authentication.

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.

Exploits (1)

exploitdb WRITEUP
by hyp3rlinx · textwebappsphp
https://www.exploit-db.com/exploits/39983

This is a detailed writeup describing a session fixation vulnerability in Symphony CMS v2.6.7. The vulnerability allows attackers to preset a user's PHPSESSID if session.use_only_cookies is disabled, as the application does not regenerate session IDs upon authentication.

Classification
Writeup 100%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Symphony CMS v2.6.7
No auth needed
Prerequisites: PHP.INI setting 'session.use_only_cookies=0' · Victim must authenticate using attacker-provided link
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/39983/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/91299
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/538714/100/0/threaded
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.html

Scores

CVSS v3 7.5
EPSS 0.0942
EPSS Percentile 94.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-362
Status published
Products (1)
getsymphony/symphony 2.6.7
Published Jun 30, 2016
Tracked Since Feb 18, 2026