Guest sessions are shared between customers when HTTP cache is enabled. Setups with Varnish are not affected by this issue
We recommend updating to the current version 6.4.8.2. You can get the update to 6.4.8.2 regularly via the Auto-Updater or directly via the download overview.
https://www.shopware.com/en/download/#shopware-6
For older versions of 6.1, 6.2, and 6.3, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.
Disabling HTTP Cache is also a valid workaround
{ "nvd_published_at": "2022-03-09T23:15:00Z", "github_reviewed_at": "2022-03-10T17:28:55Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-384" ] }