Shopware before 6.2.3 is vulnerable to a Server-Side Request Forgery (SSRF) in its "Mediabrowser upload by URL" feature. This allows an authenticated user to send HTTP, HTTPS, FTP, and SFTP requests on behalf of the Shopware platform server.
In Shopware before 6.2.3, authenticated users are allowed to use the Mediabrowser fileupload feature to upload SVG images containing JavaScript. This leads to Persistent XSS. An uploaded image can be accessed without authentication.
In Shopware before 6.2.3, the database password is leaked to an unauthenticated user when a DriverException occurs and verbose error handling is enabled.
In createInstanceFromNamedArguments in Shopware through 5.6.x, a crafted web request can trigger a PHP object instantiation vulnerability, which can result in an arbitrary deserialization if the right class is instantiated. An attacker can leverage this deserialization to achieve remote code execution. NOTE: this issue is a bypass for a CVE-2017-18357 whitelist patch.