CVE-2026-24669 is a vulnerability classified under CWE-613 (Insufficient Session Expiration) affecting the Open eClass platform, a widely used course management system. The flaw exists in versions prior to 4.2 in the password reset mechanism, where the system fails to invalidate password reset tokens after their initial use. This allows a local attacker, who has obtained a valid reset token, to reuse it multiple times to change the password of a targeted account without authorization. The vulnerability requires local access and user interaction (e.g., triggering the reset process), but no elevated privileges are necessary. The failure to expire or revoke tokens properly compromises the confidentiality and integrity of user credentials and can lead to account takeover, potentially disrupting availability if accounts are locked or manipulated. The vulnerability was publicly disclosed and assigned a CVSS 3.1 score of 7.8, indicating high severity. Although no known exploits are currently reported in the wild, the risk remains significant due to the sensitive nature of educational data and user accounts managed by Open eClass. The issue has been addressed in Open eClass version 4.2, which implements proper token invalidation to prevent reuse.

For European organizations, particularly educational institutions relying on Open eClass, this vulnerability poses a significant risk. Unauthorized password changes can lead to account takeovers, exposing sensitive academic records, personal data, and potentially enabling further lateral movement within institutional networks. The compromise of user accounts could disrupt course management, grading, and communication, impacting operational continuity and trust. Given the widespread use of Open eClass in European universities and schools, the vulnerability could affect a large number of users. The local access requirement somewhat limits remote exploitation, but insider threats or compromised local machines could be leveraged. The high CVSS score reflects the potential for severe confidentiality, integrity, and availability impacts. Additionally, the exposure of academic data could have regulatory implications under GDPR, increasing legal and compliance risks for affected organizations.

The primary mitigation is to upgrade all Open eClass installations to version 4.2 or later, where the password reset token reuse issue is fixed. Organizations should audit their current versions and prioritize patching vulnerable systems. Beyond upgrading, administrators should enforce strict session and token management policies, ensuring that password reset tokens are single-use and expire promptly. Implementing multi-factor authentication (MFA) for account recovery processes can add an additional security layer. Monitoring and logging password reset requests and account changes can help detect suspicious activities early. User education on secure password reset practices and awareness of phishing attempts is also recommended. For environments where immediate upgrading is not feasible, restricting local access and isolating vulnerable systems can reduce exploitation risk. Regular security assessments and penetration testing focusing on authentication mechanisms should be conducted to identify similar weaknesses.