{"id":"CVE-2022-35943","aliases":["BIT-codeigniter-2022-35943","EUVD-2022-6486","GHSA-5hm8-vh6r-2cjq"],"status":"published","title":"SameSite may allow cross-site request forgery (CSRF) protection to be bypassed","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)","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00611,"percentile":0.49573,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-352"],"published":"2022-08-12T20:55:10Z","modified":"2026-10-28T02:31:06Z","fixes":[{"ecosystem":"Packagist","package":"codeigniter4/shield","fixed_in":["1.0.0-beta.2"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"codeigniter","fixed_in":["4.2.3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"codeigniter4/shield","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0-beta"},{"last_affected":"1.0.0-beta"},{"fixed":"1.0.0-beta.2"}]}],"versions":["1.0.0-beta"]},{"source":"osv","ecosystem":"Bitnami","package":"codeigniter","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.2.3"}]}]},{"source":"osv","ecosystem":"Packagist","package":"codeigniter4/shield","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0-beta"},{"fixed":"1.0.0-beta.2"}]}],"versions":["1.0.0-beta","v1.0.0-beta"]}],"products":[{"vendor":"codeigniter","product":"codeigniter"},{"vendor":"codeigniter","product":"shield"},{"vendor":"codeigniter4","product":"shield"}],"references":[{"url":"https://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjq","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Mitigation","Third Party Advisory","web","advisory"]},{"url":"https://codeigniter4.github.io/userguide/libraries/security.htm","tags":["x_refsource_MISC","x_transferred","Broken Link","web"]},{"url":"https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://jub0bs.com/posts/2021-01-29-great-samesite-confusion","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-35943","tags":["advisory"]},{"url":"https://github.com/codeigniter4/shield/commit/342a368536678621998c3c41d276480cd14ec6c6","tags":["web"]},{"url":"https://github.com/advisories/GHSA-5hm8-vh6r-2cjq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/35xxx/CVE-2022-35943.json","tags":["advisory"]},{"url":"https://github.com/codeigniter4/shield","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-35943","title":"SameSite may allow cross-site request forgery (CSRF) protection to be bypassed","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)","status":"published","published":"2022-08-12T20:55:10Z","modified":"2025-04-22T17:42:18.166Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:34:40.275153Z"}],"euvd":[{"id":"EUVD-2022-6486","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::$csrfProtection` to `'session,'`remove old session data right after login (immediately after ID and password match) and regenerate CSRF token right after login (immediately after ID and password match)","status":"published","published":"2022-08-12T20:55:10Z","modified":"2025-04-22T17:42:18Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T20:52:16.055056Z"}],"ghsa":[{"id":"GHSA-5hm8-vh6r-2cjq","title":"CodeIgniter Shield Vulnerable to SameSite Attackers Bypassing the CSRF Protection","description":"### Impact\nThis vulnerability may allow [SameSite Attackers](https://canitakeyoursubdomain.name/) to bypass the [CodeIgniter4 CSRF protection](https://codeigniter4.github.io/userguide/libraries/security.html) mechanism with CodeIgniter Shield.\n\nFor this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., `https://a.example.com/`) of the target site (e.g., `http://example.com/`).\n\nThis vulnerability exists whether `Config\\Security::$csrfProtection` is `'cookie'` or `'session'`.\nIt is also exploitable whether `Config\\Security::$regenerate` is `true` or `false`.\n\n### Patches\nUpgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**.\n\n### Workarounds\nDo all of the following:\n- set `Config\\Security::$csrfProtection` to `'session'`\n- remove old session data right after login (immediately after ID and password match)\n- regenerate CSRF token right after login (immediately after ID and password match)\n\n### References\n- [CodeIgniter4 CSRF Protection](https://codeigniter4.github.io/userguide/libraries/security.html)\n- [SameSite Attacks](https://canitakeyoursubdomain.name/)\n- [SameSite Cookies](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite)\n- [The great SameSite confusion](https://jub0bs.com/posts/2021-01-29-great-samesite-confusion/)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue or discussion in [codeigniter4/shield](https://github.com/codeigniter4/shield)\n* Email us at [security@codeigniter.com](mailto:security@codeigniter.com)\n","status":"published","published":"2022-08-18T19:03:34Z","modified":"2023-01-30T05:06:59Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:36:28.424013Z"}],"nvd":[{"id":"CVE-2022-35943","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::$csrfProtection` to `'session,'`remove old session data right after login (immediately after ID and password match) and regenerate CSRF token right after login (immediately after ID and password match)","status":"published","published":"2022-08-12T21:15:07.803Z","modified":"2026-06-17T04:52:34.443Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:07:24.750124Z"}],"osv":[{"id":"CVE-2022-35943","title":"SameSite may allow cross-site request forgery (CSRF) protection to be bypassed","description":"Shield is an authentication and authorization framework for CodeIgniter 4. This vulnerability may allow [SameSite Attackers](https://canitakeyoursubdomain.name/) to bypass the [CodeIgniter4 CSRF protection](https://codeigniter4.github.io/userguide/libraries/security.html) mechanism with CodeIgniter Shield. For this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., `https://a.example.com/`) of the target site (e.g., `http://example.com/`). Upgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**. As a workaround: set `Config\\Security::$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)","status":"published","published":"2022-08-12T20:55:10Z","modified":"2026-10-28T02:31:06.866339782Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:44:26.195407Z"},{"id":"GHSA-5hm8-vh6r-2cjq","title":"CodeIgniter Shield Vulnerable to SameSite Attackers Bypassing the CSRF Protection","description":"### Impact\nThis 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.\n\nFor 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/`).\n\nThis vulnerability exists whether `Config\\Security::$csrfProtection` is `'cookie'` or `'session'`.\nIt is also exploitable whether `Config\\Security::$regenerate` is `true` or `false`.\n\n### Patches\nUpgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**.\n\n### Workarounds\nDo all of the following:\n- set `Config\\Security::$csrfProtection` to `'session'`\n- remove old session data right after login (immediately after ID and password match)\n- regenerate CSRF token right after login (immediately after ID and password match)\n\n### References\n- [CodeIgniter4 CSRF Protection](https://codeigniter4.github.io/userguide/libraries/security.html)\n- [SameSite Attacks](https://canitakeyoursubdomain.name/)\n- [SameSite Cookies](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite)\n- [The great SameSite confusion](https://jub0bs.com/posts/2021-01-29-great-samesite-confusion/)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue or discussion in [codeigniter4/shield](https://github.com/codeigniter4/shield)\n* Email us at [security@codeigniter.com](mailto:security@codeigniter.com)\n","status":"published","published":"2022-08-18T19:03:34Z","modified":"2023-12-06T01:02:25.825251Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:46:38.553953Z"},{"id":"BIT-codeigniter-2022-35943","description":"Shield is an authentication and authorization framework for CodeIgniter 4. This vulnerability may allow [SameSite Attackers](https://canitakeyoursubdomain.name/) to bypass the [CodeIgniter4 CSRF protection](https://codeigniter4.github.io/userguide/libraries/security.html) mechanism with CodeIgniter Shield. For this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., `https://a.example.com/`) of the target site (e.g., `http://example.com/`). Upgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**. As a workaround: set `Config\\Security::$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)","status":"published","published":"2024-03-06T10:53:45.787Z","modified":"2024-03-06T11:25:28.861Z","updated_at":"2026-11-02T15:28:28.70813Z"}]}}