CVE-2025-50367 identifies a stored blind Cross-Site Scripting (XSS) vulnerability in the Contact Page of the Phpgurukul Medical Card Generation System version 1.0, specifically in the mcgs/contact.php script. The vulnerability arises because the 'name' input field on the contact page does not properly sanitize user-supplied input. This lack of input validation allows an attacker to inject malicious JavaScript code that is stored on the server and later executed in the context of users who view the affected page. Being a stored blind XSS, the attacker may not immediately see the result of the injected script, but the payload executes when other users or administrators access the vulnerable page, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim. The vulnerability is present in a healthcare-related web application, which often handles sensitive personal and medical data, increasing the risk associated with exploitation. No CVSS score has been assigned yet, and no patches or known exploits in the wild have been reported as of the publication date (June 27, 2025). The absence of proper input sanitization in a critical input field is a common and well-understood web security flaw, making this vulnerability straightforward to exploit by attackers with basic web attack knowledge.

For European organizations, especially healthcare providers and medical service platforms using the Phpgurukul Medical Card Generation System or similar vulnerable systems, this vulnerability poses significant risks. Exploitation could lead to unauthorized access to sensitive patient information, manipulation of medical records, or disruption of medical card issuance processes. The confidentiality and integrity of personal health information (PHI) could be compromised, potentially violating GDPR and other data protection regulations, leading to legal and financial repercussions. Additionally, successful exploitation could facilitate further attacks such as phishing or malware distribution by leveraging the trust of legitimate users. The availability impact is generally limited in XSS but could be extended if the injected scripts perform denial-of-service actions or facilitate broader compromise. Given the healthcare context, any disruption or data breach could have serious consequences for patient care and organizational reputation.

To mitigate this vulnerability, European healthcare organizations should immediately audit and sanitize all user inputs on the contact page, especially the 'name' field, using robust server-side validation and output encoding techniques. Employing a whitelist approach for allowed characters and escaping special characters before rendering them in HTML contexts is critical. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Regularly update and patch the Phpgurukul Medical Card Generation System once official fixes become available. Conduct thorough security testing, including automated and manual penetration testing focused on XSS vulnerabilities. Educate developers on secure coding practices to prevent similar issues. Additionally, monitor web application logs for suspicious input patterns and consider implementing Web Application Firewalls (WAFs) with rules to detect and block XSS payloads. Finally, ensure incident response plans are in place to quickly address any exploitation attempts.