CVE-2021-42663: Online Event Booking And Reservation System Project Online Event Booking And Reservation System

Medium severity, CVSS 4.3. EPSS: 3.9% chance of exploitation in the next 30 days.

An HTML injection vulnerability exists in Sourcecodester Online Event Booking and Reservation System in PHP/MySQL via the msg parameter to /event-management/index.php. An attacker can leverage this vulnerability in order to change the visibility of the website. Once the target user clicks on a given link he will display the content of the HTML code of the attacker's choice.

Affected products

Published 2021-11-05. Last modified 2026-06-17.