Laravel version 8.4.2 and before with Ignition before 2.5.2 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.
View the template here CVE-2021-3129.yaml
References:
https://github.com/facade/ignition/pull/334