The MAIO WordPress plugin before 7.3.22 does not properly restrict access to its analytics data, treating a credential value shipped verbatim in its own public source as a valid API key, which allows unauthenticated attackers to retrieve the stored crawl-analytics log, including each recorded visitor's IP address, user agent and referer.
https://wpscan.com/vulnerability/45887eb3-93f9-4345-a72a-de627f23820c/