LearnPress WordPress Plugin before 4.4.6 contains a stored cross-site scripting vulnerability that allows authenticated attackers with the Instructor role to inject persistent malicious payloads by submitting unsanitized input into quiz question answer title fields. Attackers can store arbitrary JavaScript through the answer title parameter, which is rendered through an unescaped HTML sink to execute in the browsers of any user who views the affected quiz question, including students, other instructors, and administrators.