CVE-2026-3043 Details

A cross-site scripting (XSS) vulnerability has been identified in the itsourcecode Event Management System version 1.0. The issue resides in the admin/navbar.php file, where the 'page' URL parameter is manipulated, allowing the injection of arbitrary JavaScript. This unsanitized input is reflected in the output, enabling remote attackers to execute scripts in the context of the user's browser session. The vulnerability requires no authentication and can be exploited by tricking users into clicking on a malicious link.

To address this vulnerability, implement input validation to reject special characters and adopt an allow-list approach. Output encoding should be applied using functions like htmlspecialchars() or htmlentities(). Additionally, consider using security headers such as Content-Security-Policy and X-XSS-Protection. Regular security testing can also help identify and mitigate such vulnerabilities.