Insufficient verification of data authenticity in CodeIgniter4 - CVE-2022-23556
Published: December 22, 2022 / Updated: May 23, 2026
Vulnerability identifier: #VU132167
CSH Severity: Medium
CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-23556
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to spoof their IP address.
The vulnerability exists due to insufficient verification of data authenticity in the IP address handling logic when determining the client IP address behind a reverse proxy. A remote attacker can supply spoofed proxy-related address information to spoof their IP address.
Exploitation is possible when the server is deployed behind a reverse proxy.
Affected software
CodeIgniter4
How to mitigate CVE-2022-23556
Install security update from vendor's website.
CodeIgniter4 - update to 4.2.11