A remote code execution vulnerability exists in Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. An authenticated user with admin privileges to email templates can execute arbitrary code by previewing a malicious template.
github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-7903.yaml
github.com/magento/magento2
magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13
nvd.nist.gov/vuln/detail/CVE-2019-7903
web.archive.org/web/20211206084839/https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13