How severe is CVE-2026-12230?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Thimpress Learnpress – WordPress Lms Plugin For Create And Sell Online Courses

CVE-2026-12230

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Thimpress Learnpress – Wordpress Lms Plugin For Create And Sell Online Courses

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-12230?: CVE-2026-12230 is a medium-severity vulnerability in Thimpress Learnpress – WordPress Lms Plugin For Create And Sell Online Courses, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-08.
How severe is CVE-2026-12230?: Medium severity. CVSS v3 base score is 6.4 out of 10.