Impact

Not-stored XSS in storefront.
Request parameter were directly assigned to the template, so that malicious code could be send via an URL.

Patches

We recommend updating to the current version 5.7.9. You can get the update to 5.7.9 regularly via the Auto-Updater or directly via the download overview.
https://www.shopware.com/en/changelog-sw5/#5-7-9

For older versions you can use the Security Plugin:
https://store.shopware.com/en/swag575294366635f/shopware-security-plugin.html

References

https://docs.shopware.com/en/shopware-5-en/security-updates/security-update-04-2022