Social Warfare <= 3.5.2 - Unauthenticated Arbitrary Settings Update
Malicious eval() is being inserted into the wp_options table, in the option_name: social_wafare_settings, in the Twitter field.
Deactivating the plugin disables the redirect, but the malicious eval() is still in the database.
The plugin has been pulled from the WordPress repository.
So far we have seen this exploited on live sites running 3.5.1 and 3.5.2.