How severe is CVE-2014-8684?

CVE-2014-8684 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2014-8684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 72% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-8684?

CVE-2014-8684 primarily affects Codeigniter. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-8684?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2014-8684 published?

CVE-2014-8684 was published on 2017-09-19 and last updated on 2026-06-17.

CVE-2014-8684

CVE-2014-8684 is a critical-severity vulnerability in Codeigniter with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 72% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-310.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 72% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Codeigniter
Published: 2017-09-19
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 attackers to spoof session cookies and consequently conduct PHP object injection attacks by leveraging use of standard string comparison operators to compare cryptographic hashes.
How severe is CVE-2014-8684?: CVE-2014-8684 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2014-8684 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 72% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-8684?: CVE-2014-8684 primarily affects Codeigniter. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-8684?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2014-8684 published?: CVE-2014-8684 was published on 2017-09-19 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:codeigniter:codeigniter:*:*:*:*:*:*:*:*
cpe:2.3:a:kohanaframework:kohana:3.2.3:*:*:*:*:*:*:*
cpe:2.3:a:kohanaframework:kohana:3.3.0:*:*:*:*:*:*:*
cpe:2.3:a:kohanaframework:kohana:3.3.1:*:*:*:*:*:*:*

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