Deserialization in Codeigniter
CVE-2022-21647
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()`.
Vulnerability class: Insecure Deserialization
EPSS: 0.377 (98.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H.
Affected products
- Codeigniter
- Codeigniter4 — versions < 4.1.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory, Mitigation)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2022-21647?
- CVE-2022-21647 is a high-severity vulnerability in Codeigniter, classified under Deserialization of Untrusted Data. CVSS score: 7.7/10. Published 2022-01-04.
- How severe is CVE-2022-21647?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2022-21647 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.