CVE-2025-50492 is a high-severity vulnerability identified in the PHPGurukul e-Diary Management System, specifically within the /edms/change-password.php component. The flaw stems from improper session invalidation after a password change operation. When a user changes their password, the system fails to properly invalidate the existing session tokens, allowing an attacker to hijack the session and maintain unauthorized access. This vulnerability is classified under CWE-20, indicating improper input validation or handling, which in this context relates to session management logic. The CVSS 3.1 base score of 7.5 reflects a high severity, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no confidentiality or integrity impact (C:N/I:N), but a high impact on availability (A:H). This suggests that while the attacker cannot directly read or modify data, they can disrupt service availability or maintain persistent unauthorized sessions, potentially leading to denial of service or unauthorized actions under hijacked sessions. No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability affects an unspecified version of the PHPGurukul e-Diary Management System, which is a web-based application used for diary and educational management purposes.

For European organizations using the PHPGurukul e-Diary Management System, this vulnerability poses a significant risk to the availability and security of user sessions. Attackers exploiting this flaw could hijack active sessions post-password change, potentially maintaining unauthorized access to sensitive educational or personal data managed within the system. This could disrupt normal operations, cause denial of service to legitimate users, and undermine trust in the system's security. Although confidentiality and integrity impacts are rated as none, the ability to maintain unauthorized sessions can facilitate further attacks or misuse of the system's functionalities. Educational institutions and organizations relying on this system for managing student or employee data in Europe could face operational disruptions and reputational damage. Additionally, compliance with European data protection regulations such as GDPR could be jeopardized if unauthorized access leads to data exposure or misuse.

Given the absence of an official patch, European organizations should implement immediate compensating controls. First, enforce strict session management policies, including manual invalidation of all active sessions upon password changes. This can be achieved by modifying the application logic to destroy or expire session tokens server-side when a password update occurs. Secondly, implement multi-factor authentication (MFA) to reduce the risk of session hijacking exploitation. Third, monitor session activity for anomalies such as concurrent logins from different IP addresses or unusual session durations. Organizations should also conduct thorough code reviews focusing on session handling and input validation in the affected component. Network-level protections like Web Application Firewalls (WAFs) can be configured to detect and block suspicious session-related activities. Finally, maintain user awareness by educating users to log out and re-authenticate after password changes and report suspicious behavior. Organizations should stay alert for official patches or updates from PHPGurukul and apply them promptly once available.