The ARMember Lite - Membership Plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 4.0.14 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
The ARMember plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.0.5. This is due to missing or incorrect nonce validation on the arm_check_user_cap function. This makes it possible for unauthenticated attackers to perform multiple unauthorized actions via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.