The LearnPress – WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Course, Lesson, and Quiz title and content in all versions up to, and including, 4.2.6.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with LP Instructor-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.