Shopware 6 allows attackers to check for registered accounts through the store-api

Impact

Through the store-api it is possible as a attacker to check if a specific e-mail address has an account in the shop.

Using the store-api endpoint /store-api/account/recovery-password you get the response

{"errors":[{"status":"404","code":"CHECKOUT__CUSTOMER_NOT_FOUND","title":"Not Found","detail":"No matching customer for the email \[email protected]\u0022 was found.","meta":{"parameters":{"email":"[email protected]"}}}]}

which indicates clearly that there is no account for this customer. In contrast you get a success response if the account was found.

Patches

Update to Shopware 6.6.10.3

Workarounds

For older versions of 6.5 or 6.4, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.