CVE-2025-63513 identifies an Insecure Direct Object Reference (IDOR) vulnerability in the kishan0725 Hospital Management System version 4, specifically within its appointment cancellation functionality. IDOR vulnerabilities occur when an application exposes internal object references (such as database keys or file names) without proper authorization checks, allowing attackers to manipulate these references to access or modify data they should not be able to. In this case, the vulnerability allows an attacker to cancel appointments belonging to other patients by tampering with the appointment identifiers in cancellation requests. This can lead to unauthorized cancellation of medical appointments, disrupting patient care and hospital scheduling. The vulnerability is published but lacks a CVSS score and has no known exploits in the wild yet. The absence of authentication requirements or insufficient validation of user permissions on appointment cancellation requests increases the risk. The flaw compromises the integrity and availability of hospital services and patient data, potentially causing operational disruptions and patient dissatisfaction. Since hospital management systems are critical infrastructure in healthcare, exploitation could have serious consequences. No patches or mitigations are currently linked, indicating the need for urgent security reviews and fixes by the vendor and users. The vulnerability highlights the importance of implementing robust access control mechanisms and input validation in healthcare applications to prevent unauthorized data manipulation.

For European organizations, particularly hospitals and healthcare providers using kishan0725 Hospital Management System v4, this vulnerability poses a significant risk to operational continuity and patient trust. Unauthorized appointment cancellations can lead to missed medical consultations, delayed treatments, and administrative chaos. This disruption may also increase the workload on healthcare staff, reduce patient satisfaction, and potentially cause harm if critical appointments are canceled unnoticed. Additionally, the integrity of patient data and hospital scheduling systems is undermined, which could have regulatory and compliance implications under GDPR and healthcare data protection laws. The vulnerability could be exploited by malicious insiders or external attackers aiming to disrupt healthcare services or cause reputational damage. Given the critical nature of healthcare services, even temporary disruptions can have severe consequences. The lack of authentication or weak authorization checks exacerbates the threat, making it easier for attackers to exploit the flaw without sophisticated techniques. European healthcare providers must prioritize remediation to avoid service interruptions and maintain compliance with data protection standards.

To mitigate CVE-2025-63513, organizations should immediately review and strengthen access control mechanisms within the appointment cancellation functionality. This includes implementing strict authorization checks to ensure that only the patient or authorized personnel can cancel a specific appointment. Input validation should be enforced to prevent manipulation of appointment identifiers. Logging and monitoring of cancellation requests should be enhanced to detect suspicious activities promptly. Where possible, multi-factor authentication (MFA) should be applied to sensitive operations like appointment cancellations to add an additional security layer. Vendors should be engaged to develop and deploy patches addressing the IDOR vulnerability. Until patches are available, organizations can implement compensating controls such as manual verification of cancellation requests or temporary restrictions on cancellation functionalities. Regular security assessments and penetration testing focused on access control weaknesses are recommended. Training staff to recognize and report anomalies in appointment management can also help mitigate risks. Finally, maintaining up-to-date backups of scheduling data ensures recovery capability in case of malicious cancellations.