Shield is an authentication and authorization framework for CodeIgniter 4. This vulnerability may allow SameSite Attackers to bypass the CodeIgniter4 CSRF protection 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)
CVE-2022-35943
This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 64% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.9
- EG Score
- 5.9(medium)
- EPSS
- 37.7%
- KEV
- Not listed
Published
August 12, 2022
Last Modified
November 21, 2024
References (8)
- security-advisories@githubhttps://codeigniter4.github.io/userguide/libraries/security.htm
- security-advisories@githubhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite
- security-advisories@githubhttps://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjq
- security-advisories@githubhttps://jub0bs.com/posts/2021-01-29-great-samesite-confusion
- af854a3a-2127-422b-91ae-364da2661108https://codeigniter4.github.io/userguide/libraries/security.htm
- af854a3a-2127-422b-91ae-364da2661108https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite
- af854a3a-2127-422b-91ae-364da2661108https://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjq
- af854a3a-2127-422b-91ae-364da2661108https://jub0bs.com/posts/2021-01-29-great-samesite-confusion
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| codeigniter4/shield | 1.0.0-beta, v1.0.0-beta | 1.0.0-beta.2 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-25 17:13 UTCEG score recompute
- 2026-05-24 16:51 UTCEPSS rescore
Frequently asked(5)
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Dependency Blast Radius
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