CVE-2021-24149: Webnus Modern Events Calendar Lite

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Unvalidated input in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.6, did not sanitise the mec[post_id] POST parameter in the mec_fes_form AJAX action when logged in as an author+, leading to an authenticated SQL Injection issue.

Affected products

• Webnus Modern Events Calendar Lite: before 5.16.6 (fixed in 5.16.6)

Published 2021-03-18. Last modified 2026-06-17.