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CVE-2022-21647

Deserialization of Untrusted Data in Codeigniter4

7.7 HighFix available

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().

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
High
Availability
High

Exploit likelihood

37.7%Up 36.6 points since Feb 8, 2022
90%50%10%1%

What each source reports

CVE List Score used 7.7

Deserialization of Untrusted Data in Codeigniter4

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().

Record
CVE-2022-21647
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
EUVDEUVD-2022-0719 7.7

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().

Record
EUVD-2022-0719
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-w6jr-wj64-mc9x 7.7

Deserialization of Untrusted Data in Codeigniter4

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

For more information

If you have any questions or comments about this advisory:

Record
GHSA-w6jr-wj64-mc9x
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
NVD 7.7

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().

Record
CVE-2022-21647
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-502
Updated
2026-11-02
OSV 7.7

Deserialization of Untrusted Data in Codeigniter4

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().

Record
CVE-2022-21647
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
OSVGHSA-w6jr-wj64-mc9x 7.7

Deserialization of Untrusted Data in Codeigniter4

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

For more information

If you have any questions or comments about this advisory:

Record
GHSA-w6jr-wj64-mc9x
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
OSVBIT-codeigniter-2022-21647 No score

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().

Record
BIT-codeigniter-2022-21647
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
codeigniter4/framework
Packagist
 before 4.1.6
4.1.6
codeigniter
Bitnami
 4.0.0 up to 4.1.6
4.1.6
codeigniter4/framework
Packagist
 before 4.1.6, plus listed versions
4.0.04.0.0-rc.4v4.0.0-alpha.3v4.0.0-alpha.4v4.0.0-alpha.5
Show 19 moreShow less
v4.0.0-beta.1v4.0.0-beta.2v4.0.0-beta.3v4.0.0-beta.4v4.0.0-rc.1v4.0.0-rc.2v4.0.0-rc.2.1v4.0.0-rc.3v4.0.1v4.0.2v4.0.3v4.0.4v4.0.5v4.1.0v4.1.1v4.1.2v4.1.3v4.1.4v4.1.5
4.1.6

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-21647 is a high vulnerability (CVSS 7.7) in Codeigniter, published January 4, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 37.7%, the 98th percentile. Fixed in codeigniter4/framework 4.1.6.

References

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