CVE 2019-8235

An insecure direct object reference (IDOR) vulnerability exists in Magento 2.3 prior to 2.3.1, 2.2 prior to 2.2.8, and 2.1 prior to 2.1.17 versions. An authenticated user may be able to view personally identifiable shipping details of another user due to insufficient validation of user controlled input.

See the CVE page on Mitre.org for more details.