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CVE-2018-12071

28
FAUCET Score

CVE-2018-12071 is a critical session fixation vulnerability affecting CodeIgniter versions prior to 3.1.9, stemming from improper handling of the session.use_strict_mode setting in the Session Library. This flaw has a CVSS score of 9.8 (Critical), indicating it can be exploited remotely with low complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While the vulnerability is severe, there is currently no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.1.9CPE matchmatch criteria
cpe:2.3:a:codeigniter:codeigniter:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.50%
Probability of exploitation in next 30 days
EPSS Percentile
71.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0150 is in the 59th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: codeigniter/frameworkFixed in: 3.1.10

Vendor Advisories (1)

composerGHSA-g434-3q2j-hj4rcritical

CodeIgniter Session Fixation Vulnerability

May 14, 2022

References

github.com / bcit-ci/CodeIgniter/commit/800a20d6c4662d99ae0988b2f8f2238bb8bb29db
codeigniter.com / user_guide/changelog.html
Release NotesVendor Advisory