CVE-2022-35943

MEDIUM

CodeIgniter Shield <1.0.0-beta.2 - Cross-Site Request Forgery Bypass via SameSite Attack

Title source: llm
STIX 2.1

Description

Shield is an authentication and authorization framework for CodeIgniter 4. This vulnerability may allow [SameSite Attackers](https://canitakeyoursubdomain.name/) to bypass the [CodeIgniter4 CSRF protection](https://codeigniter4.github.io/userguide/libraries/security.html) mechanism with CodeIgniter Shield. For this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., `https://a.example.com/`) of the target site (e.g., `http://example.com/`). Upgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**. As a workaround: set `Config\Security::$csrfProtection` to `'session,'`remove old session data right after login (immediately after ID and password match) and regenerate CSRF token right after login (immediately after ID and password match)

References (4)

Core 4
Core References
Exploit, Mitigation, Third Party Advisory x_refsource_confirm
https://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjq
Third Party Advisory x_refsource_misc
https://jub0bs.com/posts/2021-01-29-great-samesite-confusion

Scores

CVSS v3 5.9
EPSS 0.0047
EPSS Percentile 37.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-352
Status published
Products (3)
codeigniter/codeigniter < 4.2.3
codeigniter/shield 1.0.0 beta
codeigniter4/shield 1.0.0-beta - 1.0.0-beta.2Packagist
Published Aug 12, 2022
Tracked Since Feb 18, 2026