{"id":"CVE-2022-23556","aliases":["BIT-codeigniter-2022-23556","GHSA-ghw3-5qvm-3mqc"],"url":"https://o3.security/vulnerability/CVE-2022-23556","summary":"CodeIgniter is vulnerable to IP address spoofing when using proxy","details":"### Impact\nThis vulnerability may allow attackers to spoof their IP address when your server is behind a reverse proxy.\n\n### Patches\nUpgrade to v4.2.11 or later, and configure `Config\\App::$proxyIPs`.\n\n### Workarounds\nDo not use `$request->getIPAddress()`.\n\n### References\n- https://codeigniter4.github.io/userguide/incoming/request.html#CodeIgniter\\HTTP\\Request::getIPAddress\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [codeigniter4/CodeIgniter4](https://github.com/codeigniter4/CodeIgniter4/issues)\n* Email us at [SECURITY.md](https://github.com/codeigniter4/CodeIgniter4/blob/develop/SECURITY.md)\n","published":"2022-12-22T18:50:55.443Z","modified":"2026-08-12T03:51:11.276046642Z","cvss":{"score":7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L"},"epss":{"score":0.00373,"percentile":0.30956,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"codeigniter4/framework","fixedVersion":"4.2.11"}],"fix":{"url":"https://github.com/codeigniter4/CodeIgniter4/commit/5ca8c99b2db09a2a08a013836628028ddc984659","label":"codeigniter4/CodeIgniter4@5ca8c99"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23556.json"},{"type":"ADVISORY","url":"https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-ghw3-5qvm-3mqc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23556"},{"type":"FIX","url":"https://github.com/codeigniter4/CodeIgniter4/commit/5ca8c99b2db09a2a08a013836628028ddc984659"},{"type":"WEB","url":"https://codeigniter4.github.io/userguide/incoming/request.html#CodeIgniter\\HTTP\\Request::getIPAddress"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/codeigniter4/framework/CVE-2022-23556.yaml"},{"type":"PACKAGE","url":"https://github.com/codeigniter4/CodeIgniter4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:11.276046642Z"}}