CVE-2022-21647
Deserialization of Untrusted Data in Codeigniter4
Description
### Impact 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. ### Patches Upgrade to v4.1.6 or later. ### Workarounds Do not use: - `old()` and form_helper - `RedirectResponse::withInput()` and `redirect()->withInput()` ### References - [PHP Object Injection | OWASP](https://owasp.org/www-community/vulnerabilities/PHP_Object_Injection) ### For more information If you have any questions or comments about this advisory: * Open an issue in [codeigniter4/CodeIgniter4](https://github.com/codeigniter4/CodeIgniter4/issues) * Email us at [SECURITY.md](https://github.com/codeigniter4/CodeIgniter4/blob/develop/SECURITY.md)
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 9.9%. 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
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H |