The Read More & Accordion plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.4.5. This is due to missing or incorrect nonce validation on the addNewButtons() function. This makes it possible for unauthenticated attackers to include and execute arbitrary PHP files via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Read More & Accordion plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the expmDeleteData() function in all versions up to, and including, 3.4.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary 'read more' posts.

The Read More & Accordion WordPress plugin before 3.2.7 unserializes user input provided via the settings, which could allow high-privilege users such as admin to perform PHP Object Injection when a suitable gadget is present.