A remote code execution vulnerability exists in Magento 2.2 prior to 2.2.10, Magento 2.3 prior to 2.3.3 or 2.3.2-p1. An authenticated user with privileges to manipulate CMS section of the website can trigger remote code execution via custom layout update.
github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-8137.yaml
github.com/magento/magento2
magento.com/security/patches/magento-2.3.3-and-2.2.10-security-update
nvd.nist.gov/vuln/detail/CVE-2019-8137
web.archive.org/web/20220121051105/https://magento.com/security/patches/magento-2.3.3-and-2.2.10-security-update