CVE-2026-109208

The LearnPress plugin for WordPress in versions up to and including 4.4.10 is vulnerable to PHP Object Injection via deserialization of untrusted input from the 'checkout-email' request parameter during the checkout AJAX action. The value passes through sanitize_text_field(), which does not strip serialized object syntax, is stored in the LearnPress session table, and later fed to unserialize() without an allowed_classes restriction.

LearnPress plugin in versions up to and including 4.4.9 contains a Cross Site Scripting (XSS) vulnerability exploitable by an unauthenticated attacker.

The LearnPress plugin for WordPress through 4.4.9.1 contains a stored cross-site scripting vulnerability that allows authenticated instructors to inject scripts via quiz question hint and explanation fields. Attackers with the Instructor role can submit unsanitized payloads through the update_question AJAX handler that execute in the session of every student taking the quiz.

The LearnPress plugin for WordPress up to version 4.4.7 is vulnerable to reflected DOM-based XSS via the 'orderby' parameter. Unauthenticated attackers can inject scripts that execute when a user clicks a crafted link.

Missing authorization vulnerability in the LearnPress WordPress plugin, allowing exploitation of incorrectly configured access control security levels.

Authorization Bypass Through User-Controlled Key vulnerability in ThimPress LearnPress allows exploiting incorrectly configured access control security levels. This issue affects LearnPress from n/a through 4.4.9.

The LearnPress WordPress plugin before 4.4.7 does not check the user's capabilities before applying a user supplied post status filter in one of its REST routes. Unauthenticated attackers can list courses that are not published, including draft, pending, private, scheduled and trashed ones.

The LearnPress WordPress plugin before 4.4.7 does not perform any authentication, capability or nonce check before serving a previously generated order export file. Unauthenticated attackers who can determine its identifier can download customer names, purchases, amounts and guest email addresses.

The LearnPress WordPress plugin before 4.4.7 does not check the user's capabilities in one of its administrative course tools. Unauthenticated attackers can list every enrolled student's display name and user identifier against the course they are enrolled on, and recover their email addresses through the same handler's search filter.

The LearnPress WordPress plugin before 4.4.7 does not check the user's capabilities in one of its administrative template handlers. Unauthenticated attackers can retrieve the text, identifier and type of every published quiz question on the site, along with a keyword search over them, which is content the LearnPress WordPress plugin before 4.4.7 otherwise keeps non-public.