The Download Read More Excerpt Link plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.6.0. This is due to missing or incorrect nonce validation on the read_more_excerpt_link_menu_options() function. This makes it possible for unauthenticated attackers to update he plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
https://www.wordfence.com/threat-intel/vulnerabilities/id/0359434b-9d88-4a40-8e9f-ec354c8de816