CVE-2021-3129

Unauthenticated remote code execution in Ignition

Ignition before 2.5.2, as used in Laravel and other products, allows unauthenticated remote attackers to execute arbitrary code because of insecure usage of file_get_contents() and file_put_contents(). This is exploitable on sites using debug mode with Laravel before 8.4.2.

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-2021-3129 has a CVSS score of 9.8 (Critical). 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 (2.5.2, 2.4.2, 1.16.14, 1.6.15); upgrading removes the vulnerable code path.

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1. What is CVE-2021-3129? CVE-2021-3129 is a critical-severity code injection vulnerability in facade/ignition (composer), affecting versions >= 2.5.0, < 2.5.2. It is fixed in 2.5.2, 2.4.2, 1.16.14, 1.6.15. Untrusted input is evaluated as executable code within the application's runtime environment.
2. How severe is CVE-2021-3129? CVE-2021-3129 has a CVSS score of 9.8 (Critical). 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 facade/ignition are affected by CVE-2021-3129? facade/ignition (composer) versions >= 2.5.0, < 2.5.2 is affected.
4. Is there a fix for CVE-2021-3129? Yes. CVE-2021-3129 is fixed in 2.5.2, 2.4.2, 1.16.14, 1.6.15. Upgrade to this version or later.
5. Is CVE-2021-3129 exploitable, and should I be worried? Whether CVE-2021-3129 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-2021-3129 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-2021-3129?
   • Upgrade facade/ignition to 2.5.2 or later
   • Upgrade facade/ignition to 2.4.2 or later
   • Upgrade facade/ignition to 1.16.14 or later
   • Upgrade facade/ignition to 1.6.15 or later

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