CVE-2026-12230: Thimpress Learnpress – WordPress Lms Plugin For Create And Sell Online Courses

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The LearnPress – WordPress LMS Plugin for Create and Sell Online Courses plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'layout_custom_css' parameter in all versions up to, and including, 4.3.9.1 due to insufficient input sanitization and output 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 products

• Thimpress Learnpress – WordPress Lms Plugin For Create And Sell Online Courses: up to and including 4.3.9.1

Published 2026-09-08. Last modified 2026-09-09.