What’s Vulnerable › Vulnerabilities

CVE-2026-12230: LearnPress <= 4.3.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'layout_custom_css'

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-08 · updated 2026-09-09
• Weakness: CWE-79

Description

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: through 4.3.9.1

References

• https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.4/inc/ExternalPlugin/Elementor/Widgets/Instructor/ListInstructorsElementor.php#L45
• https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.4/inc/ExternalPlugin/Elementor/Widgets/Instructor/ListInstructorsElementor.php#L82
• https://plugins.trac.wordpress.org/browser/learnpress/tags/4.4.0/inc/ExternalPlugin/Elementor/Widgets/Instructor/ListInstructorsElementor.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9f662888-c388-4191-bda9-b8a22d63cb3f?source=cve

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