The app-store plugin service fails to sanitize the `identifier` variable before concatenating it into file system paths. This allows an attacker to use path traversal sequences, such as `../`, to read, install, or uninstall plugins from arbitrary directories. This issue occurs within the `download()`, `install()`, and `unInstall()` functions in the `plugin/mine-admin/app-store/src/Service/Service.php` file. Furthermore, the `install()` function may execute arbitrary composer commands on the traversed directories. The affected API endpoints include `/admin/plugin/store/install`, `/admin/plugin/store/download`, and `/admin/plugin/store/uninstall`.