Which products and versions are affected by CVE-2014-8686?

Affected: Codeigniter. The full list is in the CVE brief.

Is CVE-2014-8686 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2014-8686 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2014-8686?

Public exploit code is available.

Is there a fix for CVE-2014-8686?

Fixed versions are available, including Codeigniter 2.1.4.

How urgently should CVE-2014-8686 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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Emerging threatsCritical

CVE-2014-8686Codeigniter Vulnerability

CodeIgniter before 2.2.0 makes it easier for attackers to decode session cookies by leveraging fallback to a custom XOR-based encryption scheme when the Mcrypt extension for PHP is not available.

Published Sep 19, 2017 · Updated May 12, 2026

Key Facts

Patch immediately

CVE-2014-8686 is a critical-severity vulnerability (CVSS 9.8 v3) affecting Codeigniter.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 37% probability of exploitation in the next 30 days.
Fixed versions are available, including Codeigniter 2.1.4.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v3

9.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

37%

Higher than 98.5% of all scored CVEs

Exploit maturity

Weaponized

ATLAS score

60/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Weaponized

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

Description

CodeIgniter before 2.2.0 makes it easier for attackers to decode session cookies by leveraging fallback to a custom XOR-based encryption scheme when the Mcrypt extension for PHP is not available.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
CodeigniterCodeigniter	See advisory	2.1.4

Patched Releases

Codeigniter

2.1.4

Timeline

Publicly disclosed
Sep 19, 2017
Last updated
May 12, 2026

Weakness Type

CWE-310

References

advisorypacketstormsecurity.com · Seagate-Business-NAS-Unauthenticated-Remote-Com…
advisorycodeigniter.com · changelog.html
advisorydionach.com · codeigniter-session-decoding-vulnerability
exploitbeyondbinary.io · seagate-nas-rce
exploitMSF seagate_nas_php_exec_noauth.rb

1 more references in the full CVE brief

FAQ

Common Questions.

CodeIgniter before 2.2.0 makes it easier for attackers to decode session cookies by leveraging fallback to a custom XOR-based encryption scheme when the Mcrypt extension for PHP is not available.
Affected: Codeigniter. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Codeigniter 2.1.4.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2014-8686 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.