VULNERABILITY INTELLIGENCE

CVE-2022-21647

CVSS score7.7 HIGH

EPSS probability37.67%

CISA KEVNot currently listed

Published2022-01-04

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H

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()`.

Weakness classification

security-advisories@github.com: CWE-502
nvd@nist.gov: CWE-502

Primary references

security-advisories@github.com — Patch, Third Party Advisory
security-advisories@github.com — Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mitigation, Third Party Advisory