CVE-2025-50491 is a vulnerability identified in the PHPGurukul Bank Locker Management System version 1, specifically within the /banker/change-password.php component. The issue stems from improper session invalidation during the password change process. When a user changes their password, the system fails to properly invalidate the existing session tokens or identifiers. This flaw allows an attacker who has obtained or intercepted a valid session token to continue using that session even after the password has been changed, effectively enabling a session hijacking attack. Session hijacking can lead to unauthorized access to user accounts, allowing attackers to perform actions on behalf of legitimate users without needing to re-authenticate. The vulnerability arises due to insufficient session management controls, which are critical in banking applications where sensitive financial and personal data are handled. Although no specific affected versions beyond 'v1' are listed and no patch links are currently available, the vulnerability is publicly disclosed and assigned a CVE identifier, indicating recognition by the security community. No known exploits are reported in the wild at this time, but the nature of the vulnerability suggests it could be exploited with relative ease if an attacker can intercept or obtain session tokens. The lack of a CVSS score means the severity must be assessed based on the impact on confidentiality, integrity, and availability, as well as exploitation complexity.

For European organizations, particularly banks and financial institutions using PHPGurukul Bank Locker Management System or similar custom banking software, this vulnerability poses a significant risk. Successful exploitation could lead to unauthorized access to customer accounts, enabling fraudulent transactions, data theft, and potential financial losses. The breach of confidentiality and integrity of user sessions undermines trust in the affected institution and could lead to regulatory penalties under GDPR due to inadequate protection of personal data. Additionally, session hijacking attacks can disrupt service availability if attackers perform malicious actions or trigger account lockouts. The impact is amplified in the European context where banking regulations and customer data protection laws are stringent. Organizations may face reputational damage and legal consequences if they fail to address such vulnerabilities promptly. Even though no exploits are currently known in the wild, the vulnerability's presence in a critical banking function necessitates immediate attention to prevent future attacks.

To mitigate this vulnerability, organizations should implement robust session management practices. Specifically, the application must invalidate all active sessions immediately upon a password change event, forcing re-authentication for all sessions associated with the user account. This can be achieved by regenerating session identifiers and clearing session data server-side. Additionally, implementing secure cookie attributes (HttpOnly, Secure, SameSite) will reduce the risk of session token theft via client-side attacks. Employing multi-factor authentication (MFA) can further reduce the risk of session hijacking by adding an additional verification layer. Regular security audits and code reviews focusing on session management logic are recommended to identify and remediate similar issues. Since no official patches are currently available, organizations using this software should consider applying custom fixes or isolating the vulnerable component until an official update is released. Monitoring for unusual session activity and implementing anomaly detection can help detect potential exploitation attempts early.