CVE-2021-24552: Simple Events Calendar Project Simple Events Calendar

High severity, CVSS 7.2. EPSS: 1.6% chance of exploitation in the next 30 days.

The Simple Events Calendar WordPress plugin through 1.4.0 does not sanitise, validate or escape the event_id POST parameter before using it in a SQL statement when deleting events, leading to an authenticated SQL injection issue

Affected products

• Simple Events Calendar Project Simple Events Calendar: up to and including 1.4.0

Published 2021-08-23. Last modified 2026-06-17.