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Vulnerability record · CVE-2022-21715 · published 24 January 2022

CVE-2022-21715: Codeigniter cross-site scripting vulnerability

Codeigniter · Codeigniter

CodeIgniter4 is the 4.x branch of CodeIgniter, a PHP full-stack web framework. A cross-site scripting (XSS) vulnerability was found in `API\ResponseTrait` in Codeigniter4 prior to version 4.1.8. Attackers can do XSS attacks if a potential victim is using `API\ResponseTrait`. Version 4.1.8 contains a patch for this vulnerability. There are two potential workarounds available. Users may avoid using `API\ResponseTrait` or `ResourceController` Users may also disable Auto Route and use defined routes only.

6.1 CVSS 3.1 Medium EPSS 1.0% · top 38.6% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

CodeIgniter4 is the 4.x branch of CodeIgniter, a PHP full-stack web framework. A cross-site scripting (XSS) vulnerability was found in `API\ResponseTrait` in Codeigniter4 prior to version 4.1.8. Attackers can do XSS attacks if a potential victim is using `API\ResponseTrait`. Version 4.1.8 contains a patch for this vulnerability. There are two potential workarounds available. Users may avoid using `API\ResponseTrait` or `ResourceController` Users may also disable Auto Route and use defined routes only.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://codeigniter4.github.io/userguide/incoming/routing.html#use-defined-routes-only MitigationVendor Advisory
https://github.com/codeigniter4/CodeIgniter4/commit/70d881cf5322b7c32e69516aebd2273ac6a1e8dd PatchThird Party Advisory
https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-7528-7jg5-6g62 MitigationThird Party Advisory
https://codeigniter4.github.io/userguide/incoming/routing.html#use-defined-routes-only MitigationVendor Advisory
https://github.com/codeigniter4/CodeIgniter4/commit/70d881cf5322b7c32e69516aebd2273ac6a1e8dd PatchThird Party Advisory
https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-7528-7jg5-6g62 MitigationThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-21715), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.