CVE-2021-24553: Timeline Calendar Project Timeline Calendar

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

The Timeline Calendar WordPress plugin through 1.2 does not sanitise, validate or escape the edit GET parameter before using it in a SQL statement when editing events, leading to an authenticated SQL injection issue. Other SQL Injections are also present in the plugin

Affected products

• Timeline Calendar Project Timeline Calendar: up to and including 1.2

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