Wings is the server control plane for Pterodactyl, a free, open-source game server management panel. Prior to 1.12.3, {{config.}} placeholders in egg configuration-file templates allow a low-privileged user to read {{config.token}}, {{config.token_id}}, and {{config.docker.registries}} from the full daemon configuration. This issue is fixed in version 1.12.3.
https://github.com/pterodactyl/wings/security/advisories/GHSA-pfvc-3p5h-x7h6
https://github.com/pterodactyl/wings/releases/tag/v1.12.3
https://github.com/pterodactyl/wings/commit/eb65e27ae077a63e38518c490768486af1cd86a9