CVE-2026-16229 Details

A cross-site scripting (XSS) vulnerability has been identified in the itsourcecode Courier Management System, specifically in version 1.0. The issue arises in the file index.php, where user-supplied input through the 'page' parameter is not properly sanitized before being reflected in the output. This flaw allows remote attackers to inject and execute arbitrary JavaScript in the context of the victim's browser session. The vulnerability requires no authentication and can be exploited by tricking a user into clicking a malicious link.

To address this vulnerability, implement input validation to reject special characters, use an allow-list approach, and apply output encoding techniques such as htmlspecialchars() or htmlentities(). Additionally, consider adding security headers like Content-Security-Policy and X-XSS-Protection, and conduct regular security testing.