CVE-2022-21647 in the critical feed json
Deserialization of Untrusted Data in Codeigniter4
published 2022-01-04 4 y ago modified 2026-06-17 4 mo ago also BIT-codeigniter-2022-21647 , EUVD-2022-0719 , GHSA-w6jr-wj64-mc9x
- cvss
- 7.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 37.7%
- EPSS 37.7% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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()`.
Patch / fix
- packagist codeigniter4/framework 4.1.6
- bitnami codeigniter 4.1.6
- codeigniter codeigniter 4.1.6
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
37.67% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H |
| GitHub | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | codeigniter4/framework | <4.1.6 |
4.1.6 |
| bitnami | codeigniter | >=4.0.0, <4.1.6 |
4.1.6 |
Affected products
- codeigniter4 CodeIgniter4
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/codeigniter4/CodeIgniter4/commit/ce95ed5765256e2f09f3513e7d42790e0d6948f5
web, patch, third-party-advisory
-
github.com
/codeigniter4/CodeIgniter4/security/advisories/GHSA-w6jr-wj64-mc9x
web, mitigation, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2022-21647
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/codeigniter4/framework/CVE-2022-21647.yaml
web
-
github.com
/codeigniter4/CodeIgniter4
package
Sources
- CVE List CVE-2022-21647
- GitHub Advisory GHSA-w6jr-wj64-mc9x
- NVD CVE-2022-21647
- OSV BIT-codeigniter-2022-21647
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.