Grav is a file-based Web platform. Prior to 2.0.2, the Grav Twig content sandbox permits grav.offsetGet('config') to return the raw configuration object and permits json_encode, print_r, yaml_encode, and string filters to serialize that object without passing through GravSecurityPolicy::checkMethodAllowed. A user with page-author permissions can render sandboxed content that exposes plugins.* configuration secrets, including SMTP credentials, API keys, and plugin database credentials. This issue is fixed in version 2.0.2.
https://github.com/getgrav/grav/security/advisories/GHSA-mc5q-6hpj-rp7j
https://github.com/getgrav/grav/releases/tag/2.0.2
https://github.com/getgrav/grav/commit/7efe70574e4cf01a251318478c13673029e93eb6