CVE-2026-4333: LearnPress <= 4.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'skin' Shortcode Attribute
The LearnPress – WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'skin' attribute of the learnpresscourses shortcode in all versions up to and including 4.3.3. This is due to insufficient input sanitization and output escaping on the 'skin' shortcode attribute. The attribute value is used directly in an sprintf() call that generates HTML (class attribute and data-layout attribute) without any escattr() escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-4333?
CVE-2026-4333 is classified as a medium severity vulnerability due to its ability to exploit stored cross-site scripting.
How do I fix CVE-2026-4333?
To fix CVE-2026-4333, update the LearnPress plugin to version 4.3.4 or later, which addresses this vulnerability.
Who is affected by CVE-2026-4333?
CVE-2026-4333 affects all versions of the LearnPress plugin up to and including 4.3.3.
What kind of vulnerability is CVE-2026-4333?
CVE-2026-4333 is a stored cross-site scripting (XSS) vulnerability found in the 'skin' attribute of the learn_press_courses shortcode.
What can attackers do with CVE-2026-4333?
Attackers can exploit CVE-2026-4333 to inject malicious scripts that execute in the context of an authenticated user’s session.