CSRF in Codeigniter
CVE-2022-35943
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)
Vulnerability class: CSRF (Cross-Site Request Forgery)
EPSS: 0.005 (39.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L.
Affected products
- Codeigniter
- Codeigniter Shield — versions 1.0.0
- Codeigniter4 Shield — versions > 4.3.2, > v1.0.0-beta.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory, Mitigation)
- security-advisories@github.com (x_refsource_MISC, Broken Link)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2022-35943?
- CVE-2022-35943 is a medium-severity vulnerability in Codeigniter, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.9/10. Published 2022-08-12.
- How severe is CVE-2022-35943?
- Medium severity. CVSS v3 base score is 5.9 out of 10.