CVE-2022-21647

Description

CodeIgniter is an open source PHP full-stack web framework. Deserialization of Untrusted Data was found in the `old()` function in CodeIgniter4. Remote attackers may inject auto-loadable arbitrary objects with this vulnerability, and possibly execute existing PHP code on the server. We are aware of a working exploit, which can lead to SQL injection. Users are advised to upgrade to v4.1.6 or later. Users unable to upgrade as advised to not use the `old()` function and form_helper nor `RedirectResponse::withInput()` and `redirect()->withInput()`.

How to fix CVE-2022-21647

To remediate CVE-2022-21647, upgrade the affected package to a fixed version below.

• —upgrade to 4.1.6 or later
• —upgrade to 4.1.6 or later

Is CVE-2022-21647 being exploited?

Moderate — EPSS is 37.7%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (2)

• >= 4.0.0, < 4.1.6
• from 0, < 4.1.6

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-21647
• PATCHgithub.com/codeigniter4/CodeIgniter4
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/codeigniter4/framework/CVE-2022-21647.yaml
• WEBgithub.com/codeigniter4/CodeIgniter4/commit/ce95ed5765256e2f09f3513e7d42790e0d6948f5