The EmbedPress WordPress plugin before 4.6.4 does not have proper authorization on a public review-loading action, allowing unauthenticated users to force the site to make repeated billable third-party API requests using the site's own configured API key, and to create an unbounded number of attacker-controlled rows in the database.
https://wpscan.com/vulnerability/bd708c98-1657-423b-aa2b-14aa18307c03/