SB2022010433 - Deserialization of Untrusted Data in CodeIgniter4
Published: January 4, 2022 Updated: May 23, 2026
Security Bulletin ID
SB2022010433
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deserialization of Untrusted Data (CVE-ID: CVE-2022-21647)
CWE-ID: CWE-502 - Deserialization of Untrusted Data
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to execute existing PHP code on the server.
The vulnerability exists due to deserialization of untrusted data in the old() function when processing serialized input. A remote attacker can inject auto-loadable arbitrary objects to execute existing PHP code on the server.
We are aware of a working exploit that can lead to SQL injection.
Remediation
Install update from vendor's website.