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Fencer Vulns
high 7.5

CVE-2016-4309 in the critical feed json

Session fixation vulnerability in Symphony CMS 2.6.7, when session.use_only_cookies is disabled, allows remote attackers to hijack web sess…

published 2016-06-30 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5309

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.2%
EPSS 10.2% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

Timeline

  1. First public exploit (EDB-39983)
  2. Published

Exploit prediction

10.22% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-39983 Symphony CMS 2.6.7 - Session Fixation webapps, 2016-06-20
  • packetstormsecurity.com http://packetstormsecurity.com/files/137551/Symphony-CMS-2.6.7-Session-Fixation.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 7.6 AV:N/AC:H/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.