The Pie Register WordPress plugin through 3.8.4.15 does not perform any capability, nonce or authentication check on one of its request handlers, allowing unauthenticated attackers to reset the Pie Register WordPress plugin through 3.8.4.15's settings to their defaults (disabling registration security controls such as new-user email verification) and to destroy a Pie Register WordPress plugin through 3.8.4.15 data table.