How severe is CVE-2022-23556?

CVE-2022-23556 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2022-23556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-23556?

CVE-2022-23556 affects Codeigniter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-23556?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-23556 published?

CVE-2022-23556 was published on 2022-12-22 and last updated on 2026-06-17.

CVE-2022-23556

CVE-2022-23556 is a high-severity vulnerability in Codeigniter with a CVSS 3.x base score of 7.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-345.

Key facts

Severity: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Codeigniter
Published: 2022-12-22
Last modified: 2026-06-17

Description

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()`.

Frequently asked questions

What is CVE-2022-23556?: 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()`.
How severe is CVE-2022-23556?: CVE-2022-23556 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2022-23556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-23556?: CVE-2022-23556 affects Codeigniter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-23556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-23556 published?: CVE-2022-23556 was published on 2022-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:codeigniter:codeigniter:*:*:*:*:*:*:*:*

More vulnerabilities in Codeigniter

CVE-2025-54418 — Critical (CVSS 9.8): CodeIgniter is a PHP full-stack web framework. A command injection vulnerability present in versions prior to 4.6.2…
CVE-2023-32692 — Critical (CVSS 9.8): CodeIgniter is a PHP full-stack web framework. This vulnerability allows attackers to execute arbitrary code when you…
CVE-2022-40835 — Critical (CVSS 9.8): B.C. Institute of Technology CodeIgniter <=3.1.13 is vulnerable to SQL Injection via…
CVE-2022-40834 — Critical (CVSS 9.8): B.C. Institute of Technology CodeIgniter <=3.1.13 is vulnerable to SQL Injection via…
CVE-2022-40833 — Critical (CVSS 9.8): B.C. Institute of Technology CodeIgniter <=3.1.13 is vulnerable to SQL Injection via…
CVE-2022-40832 — Critical (CVSS 9.8): B.C. Institute of Technology CodeIgniter <=3.1.13 is vulnerable to SQL Injection via…

All CVEs affecting Codeigniter →

Other CWE-345 (Insufficient Verification of Data Authenticity) vulnerabilities

CVE-2026-35051 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an…
CVE-2014-8165 — Critical (CVSS 10.0): scripts/amsvis/powerpcAMS/amsnet.py in powerpc-utils-python uses the pickle Python module unsafely, which allows remote…
CVE-2026-50195 — Critical (CVSS 9.9): containerd is an open-source container runtime. Versions prior to 2.3.2, 2.2.5 and 2.1.9 contain a vulnerability in the…
CVE-2022-36130 — Critical (CVSS 9.9): HashiCorp Boundary up to 0.10.1 did not properly perform data integrity checks to ensure the resources were associated…
CVE-2026-50214 — Critical (CVSS 9.8): The /v1/Plan service relies entirely on a shared global API token for full administrative management, allowing…
CVE-2025-15385 — Critical (CVSS 9.8): Insufficient Verification of Data Authenticity vulnerability in TECNO Mobile com.Afmobi.Boomplayer allows…

Browse all CWE-345 (Insufficient Verification of Data Authenticity) vulnerabilities →