PrestaShop is an open source e-commerce web application. Prior to version 8.1.1, the `displayAjaxEmailHTML` method can be used to read any file on the server, potentially even outside of the project if the server is not correctly configured. Version 8.1.1 contains a patch for this issue. There are no known workarounds.
https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-hpf4-v7v2-95p2
https://github.com/PrestaShop/PrestaShop/commit/11de3a84322fa4ecd0995ac40d575db61804724c