{"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":"CodeIgniter is a PHP full-stack web framework. This vulnerability may allow attackers to spoof their IP address when the server is behind a reverse proxy. This issue has been patched, please upgrade to version 4.2.11 or later, and configure `Config\\App::$proxyIPs`. As a workaround, do not use `$request->getIPAddress()`.\n","published":"2022-12-22T18:50:55.443Z","modified":"2026-08-08T03:47:30.528424902Z","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":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:47:30.528424902Z"}}