The environment can be downloaded at https://github.com/pluck-cms/pluck
The Stored XSS is found in the installation of PluckCMS.
The following page is displayed when the program is installed http://127.0.0.1/CVE-Target/pluck/install.php Click on Start the installation. In step1, Click Proceed. In step2, Feel free to fill in the blanks and click save. In step3, and enter <script>alert('xss')</script> in the content and click save.
Then Click take a look at your website to trigger xss and it is a storage type.