CVE-2014-8684: CodeIgniter before 3.0 and Kohana 3.2.3 and earlier and 3.3.x through 3.3.2 make it easier for remote attacker

This week

CRITICAL 9.8REMOTEUPGRADEDOWNGRADE

CVE-2014-8684 is a critical-severity flaw (CVSS 9.8) affecting codeigniter, kohana. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CodeIgniter before 3.0 and Kohana 3.2.3 and earlier and 3.3.x through 3.3.2 make it easier for remote attackers to spoof session cookies and consequently conduct PHP object injection attacks by leveraging use of standard string comparison operators to compare cryptographic hashes.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	72.2% (top 1%)
CISA exploited list	No
Weakness	CWE-310
Published	2017-09-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: codeigniter · kohanaframework

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-09-19 19:29 UTCPublished CVE record published
2026-06-17 00:17 UTCUpdated Record last modified

codeigniter codeigniter UPGRADE

Affected: <= 2.2.6

Fixed in: newer than 2.2.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy codeigniter || rpm -q codeigniter || codeigniter --version

2. UPGRADE to newer than 2.2.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade codeigniter

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade codeigniter

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

kohanaframework kohana DOWNGRADE

Affected: 3.2.3 · 3.3.0 · 3.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2.3

1. Check installed version

apt-cache policy kohana || rpm -q kohana || kohana --version

2. No fixed release: DOWNGRADE to a release before 3.2.3 (Debian / Ubuntu)

apt-cache madison kohana sudo apt install kohana=<VERSION_BEFORE_3.2.3> sudo apt-mark hold kohana

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kohana sudo dnf downgrade kohana-<VERSION_BEFORE_3.2.3> sudo dnf versionlock add kohana

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Seagate Business NAS - Remote Command Execution (Metasploit)
Metasploit: Seagate Business NAS Unauthenticated Remote Command Execution

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2014-8684?

codeigniter: upgrade to newer than 2.2.6; kohana: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-8684 being exploited?

CVE-2014-8684 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2014-8684 affect?

CVE-2014-8684 affects codeigniter, kohana. Severity is critical (CVSS 9.8). CodeIgniter before 3.0 and Kohana 3.2.3 and earlier and 3.3.x through 3.3.2 make it easier for remote attackers to spoof session cookies and consequently conduct PHP object injection attacks by leveraging use of standard string comparison o

How urgent is CVE-2014-8684?

Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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