WordPress Core < 4.7.3 - Cross-Site Request Forgery via Press This

Reaching this weakness in WordPress 4.7 3.7 – 4.7.2 · 12 branches takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For WordPress 4.7 the fix is 3.7.19: builds 3.7 – 4.7.2 · 12 branches are affected, anything from 3.7.19 onward is not.