Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in inc2734 Smart Custom Fields allows Stored XSS.This issue affects Smart Custom Fields: from n/a through 5.0.0.

The Smart Custom Fields plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the relational_posts_search() function in all versions up to, and including, 4.2.2. This makes it possible for authenticated attackers, with subscrber-level access and above, to retrieve post content that is password protected and/or private.