A stored cross-site scripting vulnerability exists in the WYSIWYG editor of Magento Open Source prior to 1.9.4.2, and Magento Commerce prior to 1.14.4.2, 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 privileges to the editor can inject malicious SWF files.

Magento 2 Community Edition XSS Vulnerability