CVE-2026-3302: XSS in Doctor Appointment System 1.0

Successful exploitation of CVE-2026-3302 allows an attacker to execute arbitrary JavaScript code within the context of a victim's browser session. This can lead to a variety of malicious actions, including session hijacking, credential theft, and defacement of the application. The attacker could potentially steal sensitive patient data or gain unauthorized access to administrative functions. Given the public availability of the exploit, the risk of immediate exploitation is significant. The impact is amplified if the application is used in a healthcare setting, where patient privacy is paramount.

1. Reserved2026-02-26
2. Published2026-02-27
3. EPSS updated2026-03-23

The primary mitigation for CVE-2026-3302 is to upgrade to a patched version of Doctor Appointment System. Since a fixed version is not specified, immediate action is crucial. As a temporary workaround, implement strict input validation and output encoding on the Email field in /register.php. A Web Application Firewall (WAF) can be configured to block requests containing suspicious characters or patterns in the Email parameter. Regularly review and update WAF rules to address evolving attack techniques. Consider implementing Content Security Policy (CSP) to restrict the sources from which scripts can be executed.