CVE-2018-12071

CRITICALNVD 9.8

9.8

A Session Fixation issue exists in CodeIgniter before 3.1.9 because session.use_strict_mode in the Session Library was mishandled.

CVSS v3: 9.8
EG Score: —
EPSS: 47.5%
KEV: Not listed

Published

June 17, 2018

Last Modified

June 9, 2025

References (3)

cve@mitrehttps://github.com/bcit-ci/CodeIgniter/commit/800a20d6c4662d99ae0988b2f8f2238bb8bb29db
cve@mitrehttps://www.codeigniter.com/user_guide/changelog.html
af854a3a-2127-422b-91ae-364da2661108https://www.codeigniter.com/user_guide/changelog.html

Affected Packages

(1 across 1 ecosystem)

Packagist(1)

Package	Vulnerable range	Fixed in	Dependents
codeigniter/framework	3.0.0 ... 3.1.9 (22 versions)	3.1.10	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-384Session Fixation

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 06:16 UTCOSV refresh

Frequently asked(5)

What is CVE-2018-12071?

CVE-2018-12071 is a critical vulnerability published on June 17, 2018. A Session Fixation issue exists in CodeIgniter before 3.1.9 because session.usestrictmode in the Session Library was mishandled.

When was CVE-2018-12071 disclosed?

CVE-2018-12071 was first published in the National Vulnerability Database on June 17, 2018, with the most recent update on June 9, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-12071 actively exploited?

CVE-2018-12071 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-12071?

CVE-2018-12071 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-12071?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-12071, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-12071

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