CVE-2025-24013

Workarounds

Validate HTTP header keys and/or values if using user-supplied values before passing them to Header class.

Differences from CVE-2023-29197

1. Affected Software:

   • CVE-2023-29197 specifically addresses a vulnerability in the guzzlehttp/psr7 library.
   • The reported issue in this Security Advisory is within the CodeIgniter4 framework and does not depend on or use the guzzlehttp/psr7 library.

2. Root Cause and Implementation:

   • The vulnerability reported arises from an issue in the Header class of CodeIgniter4, which is unrelated to the functionality or implementation of guzzlehttp/psr7.

3. Scope of Impact:

   • The vulnerability described in this Security Advisory affects applications built with the CodeIgniter4 framework, which does not use or rely on the guzzlehttp/psr7 library.

References

• https://datatracker.ietf.org/doc/html/rfc7230#section-3.2
• https://github.com/advisories/GHSA-wxmh-65f7-jcvw

Lack of proper header validation for its name and value. The potential attacker can construct deliberately malformed headers with Header class. This could disrupt application functionality, potentially causing errors or generating invalid HTTP requests. In some cases, these malformed requests might lead to a DoS scenario if a remote service’s web application firewall interprets them as malicious and blocks further communication with the application.

CVE-2025-24013 has a CVSS score of 5.3 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (4.5.8); upgrading removes the vulnerable code path.

Kodem intelligence

Upgrade to v4.5.8 or later.

1. What is CVE-2025-24013? CVE-2025-24013 is a medium-severity security vulnerability in codeigniter4/framework (composer), affecting versions < 4.5.8. It is fixed in 4.5.8.
2. How severe is CVE-2025-24013? CVE-2025-24013 has a CVSS score of 5.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of codeigniter4/framework are affected by CVE-2025-24013? codeigniter4/framework (composer) versions < 4.5.8 is affected.
4. Is there a fix for CVE-2025-24013? Yes. CVE-2025-24013 is fixed in 4.5.8. Upgrade to this version or later.
5. Is CVE-2025-24013 exploitable, and should I be worried? Whether CVE-2025-24013 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2025-24013 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2025-24013? Upgrade codeigniter4/framework to 4.5.8 or later.