CVE-2025-63529 identifies a session fixation vulnerability in the Blood Bank Management System 1.0, specifically within the login.php component. The flaw allows an attacker to set or predict a session identifier (session ID) before the victim authenticates. Normally, secure applications generate a new session ID upon successful login to prevent session fixation attacks. However, in this case, the application continues to use the attacker-supplied session ID after authentication, which enables the attacker to hijack the victim's authenticated session. This vulnerability is classified under CWE-384 (Session Fixation). The vulnerability requires the attacker to trick the victim into authenticating with the attacker-controlled session ID, implying user interaction is necessary. The CVSS v3.1 score is 6.1, indicating medium severity, with attack vector network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and user interaction required (UI:R). The impact affects confidentiality and integrity but not availability, as unauthorized access to victim accounts can lead to data exposure or manipulation. No patches or known exploits are currently available, but the vulnerability poses a significant risk to the confidentiality of sensitive healthcare data managed by the system.

For European organizations, particularly healthcare providers and blood banks using the Blood Bank Management System 1.0, this vulnerability could lead to unauthorized access to sensitive patient and donor data. Attackers exploiting this flaw can hijack authenticated sessions, potentially manipulating or stealing confidential information, which may violate GDPR and other data protection regulations. The breach of patient data confidentiality could result in legal penalties, reputational damage, and loss of trust. Additionally, unauthorized access could disrupt blood bank operations by altering records, affecting blood supply management. The medium severity score reflects that while the attack requires user interaction, the ease of exploitation and the critical nature of healthcare data elevate the risk. Given the sensitive nature of healthcare systems, even medium severity vulnerabilities warrant urgent attention.

1. Implement session ID regeneration immediately upon successful user authentication to prevent session fixation. 2. Enforce secure cookie attributes such as HttpOnly, Secure, and SameSite to protect session cookies from interception and cross-site attacks. 3. Conduct thorough code reviews and security testing focusing on session management logic within login.php and related components. 4. Educate users and administrators about the risks of session fixation and encourage vigilance against phishing or social engineering attempts that could facilitate session fixation. 5. Monitor application logs for unusual session activity or multiple logins from the same session ID. 6. If possible, deploy Web Application Firewalls (WAFs) with rules to detect and block session fixation attempts. 7. Coordinate with the vendor or development team to release and apply patches addressing this vulnerability promptly. 8. Review and update session timeout policies to limit the window of opportunity for attackers.