CVE-2022-23556
CodeIgniter is vulnerable to IP address spoofing when using proxy
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 $request->getIPAddress().
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
CodeIgniter is vulnerable to IP address spoofing when using proxy
CodeIgniter is a PHP full-stack web framework. This vulnerability may allow attackers to spoof their IP address when the server is behind a reverse proxy. This issue has been patched, please upgrade to version 4.2.11 or later, and configure Config\App::$proxyIPs. As a workaround, do not use $request->getIPAddress().
- Record
CVE-2022-23556- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-345
- Updated
- 2026-11-02
EUVDEUVD-2022-7632
CodeIgniter is a PHP full-stack web framework. This vulnerability may allow attackers to spoof their IP address when the server is behind a reverse proxy. This issue has been patched, please upgrade to version 4.2.11 or later, and configure Config\App::$proxyIPs. As a workaround, do not use $request->getIPAddress().
- Record
EUVD-2022-7632- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-ghw3-5qvm-3mqc
CodeIgniter4 allows spoofing of IP address when using proxy
Impact
This vulnerability may allow attackers to spoof their IP address when your server is behind a reverse proxy.
Patches
Upgrade to v4.2.11 or later, and configure Config\App::$proxyIPs.
Workarounds
Do not use $request->getIPAddress().
References
- https://codeigniter4.github.io/userguide/incoming/request.html#CodeIgniter\HTTP\Request::getIPAddress
For more information
If you have any questions or comments about this advisory:
- Open an issue in codeigniter4/CodeIgniter4
- Email us at SECURITY.md
- Record
GHSA-ghw3-5qvm-3mqc- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-345
- Updated
- 2026-11-02
NVD
CodeIgniter is a PHP full-stack web framework. This vulnerability may allow attackers to spoof their IP address when the server is behind a reverse proxy. This issue has been patched, please upgrade to version 4.2.11 or later, and configure Config\App::$proxyIPs. As a workaround, do not use $request->getIPAddress().
- Record
CVE-2022-23556- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-345
- Updated
- 2026-11-02
OSV
CodeIgniter is vulnerable to IP address spoofing when using proxy
CodeIgniter is a PHP full-stack web framework. This vulnerability may allow attackers to spoof their IP address when the server is behind a reverse proxy. This issue has been patched, please upgrade to version 4.2.11 or later, and configure Config\App::$proxyIPs. As a workaround, do not use $request->getIPAddress().
- Record
CVE-2022-23556- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-345
- Updated
- 2026-11-02
OSVGHSA-ghw3-5qvm-3mqc
CodeIgniter4 allows spoofing of IP address when using proxy
Impact
This vulnerability may allow attackers to spoof their IP address when your server is behind a reverse proxy.
Patches
Upgrade to v4.2.11 or later, and configure Config\App::$proxyIPs.
Workarounds
Do not use $request->getIPAddress().
References
- https://codeigniter4.github.io/userguide/incoming/request.html#CodeIgniter\HTTP\Request::getIPAddress
For more information
If you have any questions or comments about this advisory:
- Open an issue in codeigniter4/CodeIgniter4
- Email us at SECURITY.md
- Record
GHSA-ghw3-5qvm-3mqc- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L - Weakness
- CWE-345
- Updated
- 2026-11-02
OSVBIT-codeigniter-2022-23556 No score
CodeIgniter is a PHP full-stack web framework. This vulnerability may allow attackers to spoof their IP address when the server is behind a reverse proxy. This issue has been patched, please upgrade to version 4.2.11 or later, and configure Config\App::$proxyIPs. As a workaround, do not use $request->getIPAddress().
- Record
BIT-codeigniter-2022-23556- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
codeigniter4/frameworkPackagist |
before 4.2.11 | 4.2.11 |
codeigniterBitnami |
4.0.0 up to 4.2.11 | 4.2.11 |
codeigniter4/frameworkPackagist |
before 4.2.11, plus listed versions 4.0.04.0.0-rc.4v4.0.0-alpha.3v4.0.0-alpha.4v4.0.0-alpha.5 Show 34 moreShow lessv4.0.0-beta.1v4.0.0-beta.2v4.0.0-beta.3v4.0.0-beta.4v4.0.0-rc.1v4.0.0-rc.2v4.0.0-rc.2.1v4.0.0-rc.3v4.0.1v4.0.2v4.0.3v4.0.4v4.0.5v4.1.0v4.1.1v4.1.2v4.1.3v4.1.4v4.1.5v4.1.6v4.1.7v4.1.8v4.1.9v4.2.0v4.2.1v4.2.10v4.2.2v4.2.3v4.2.4v4.2.5v4.2.6v4.2.7v4.2.8v4.2.9 |
4.2.11 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2022-23556 is a high vulnerability (CVSS 7.0) in Codeigniter, published December 22, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.40%, the 34th percentile. Fixed in codeigniter4/framework 4.2.11.
References
github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-ghw3-5qvm-3mqc
codeigniter4.github.io/userguide/incoming/request.html
nvd.nist.gov/vuln/detail/CVE-2022-23556