An unauthenticated user can execute arbitrary code through an SQL injection vulnerability, which causes sensitive data leakage. This issue is fixed in Magento Open Source 1.9.4.1, Magento Commerce 1.14.4.1, SUPEE-11086, Magento 2.2.8, Magento 2.3.1.
Source: NIST
CVE-2019-7139 (magento)