Exposure of Sensitive Information to an Unauthorized Actor
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions output data of the function wp_die() can be leaked under certain conditions, which can include data like nonces. It can then be used to perform actions on your behalf. This has been patched in WordPress in 5.8.x before 5.8.1, 5.7.x before 5.7.3, 5.6.x before 5.6.5, 5.5.x before 5.5.6, 5.4.x before 5.4.7, 5.3.x before 5.3.9, 5.2.x before 5.2.12 . It's strongly recommended that you keep auto-updates enabled to receive the fix.
CWE-200 - Information Exposure
An information exposure vulnerability is categorized as an information flow (IF) weakness, which can potentially allow unauthorized access to otherwise classified information in the application, such as confidential personal information (demographics, financials, health records, etc.), business secrets, and the application's internal environment.