Add Multiple Marker <= 1.2 - Cross-Site Request Forgery

The Add Multiple Marker plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.2. This is due to missing or incorrect nonce validation on several functions like addmultiplemarker_save_maps_data(). This makes it possible for unauthenticated attackers to modify the plugin's settings granted they can trick a site administrator into performing an action such as clicking on a link. The impact of this vulnerability is unknown.