CVE-2020-27481: Goodlayers Good Learning Management System

Critical severity, CVSS 9.8. EPSS: 10% chance of exploitation in the next 30 days.

An unauthenticated SQL Injection vulnerability in Good Layers LMS Plugin <= 2.1.4 exists due to the usage of "wp_ajax_nopriv" call in WordPress, which allows any unauthenticated user to get access to the function "gdlr_lms_cancel_booking" where POST Parameter "id" was sent straight into SQL query without sanitization.

Affected products

• Goodlayers Good Learning Management System: up to and including 2.1.4

Published 2020-11-12. Last modified 2026-06-17.