Shopware is open source e-commerce software. Versions prior to 5.7.6 contain a cross-site scripting vulnerability. This issue is patched in version 5.7.6. Two workarounds are available. Using the security plugin or adding a particular following config to the `.htaccess` file will protect against cross-site scripting in this case. There is also a config for those using nginx as a server. The plugin and the configs can be found on the GitHub Security Advisory page for this vulnerability.
https://store.shopware.com/en/swag575294366635f/shopware-security-plugin.html
https://github.com/shopware/shopware/security/advisories/GHSA-4p3x-8qw9-24w9
https://github.com/shopware/shopware/releases/tag/v5.7.6
https://github.com/shopware/shopware/commit/37213e91d525c95df262712cba80d1497e395a58
https://docs.shopware.com/en/shopware-5-en/sicherheitsupdates/security-update-10-2021