CVE-2019-7882: Magento 2 Community Edition XSS Vulnerability

The vulnerability stems from improper handling of SWF file uploads in the WYSIWYG editor. The identified functions are core components responsible for processing user-uploaded files. The lack of validation/SWF filtering in these functions (patched in later versions) allowed attackers to inject malicious SWF files. The XSS occurs when these files are rendered, as SWF can execute scripts via parameters like 'flashvars'. The confidence is high because these components directly align with the vulnerability's attack vector (authenticated SWF upload) and Magento's security patches typically target such core handlers.