CVE-2025-32223 is an authorization bypass vulnerability identified in Themeum Tutor LMS, a popular learning management system widely used in educational and training environments. The vulnerability stems from CWE-639, which involves authorization bypass through a user-controlled key. Specifically, the LMS improperly configures access control security levels, allowing an attacker with limited privileges (requiring some level of authentication) to manipulate a key parameter under their control to gain unauthorized access to sensitive information. The vulnerability does not require user interaction beyond the attacker’s own actions and does not affect system integrity or availability, but it compromises confidentiality by exposing data that should be restricted. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low complexity and no user interaction, but requiring privileges. The affected versions include all Tutor LMS versions up to 3.9.4, with no patch currently available at the time of publication. No known exploits have been reported in the wild, but the vulnerability poses a significant risk to organizations relying on Tutor LMS for managing sensitive educational content and user data. The issue highlights the importance of correctly implementing access control mechanisms and validating user-controlled inputs that influence authorization decisions.

The primary impact of CVE-2025-32223 is unauthorized disclosure of sensitive information within Tutor LMS environments. Attackers with limited privileges can bypass access controls to view data they should not access, potentially including student records, grades, personal information, or proprietary educational content. This breach of confidentiality can lead to privacy violations, regulatory non-compliance (e.g., FERPA, GDPR), reputational damage, and loss of trust among users and stakeholders. Since the vulnerability does not affect integrity or availability, the risk of data tampering or service disruption is low. However, the ease of exploitation (network accessible, low complexity) and the widespread use of Tutor LMS in educational institutions worldwide amplify the threat. Organizations that do not promptly address this vulnerability may face targeted attacks aiming to harvest sensitive data or gain footholds for further exploitation.

1. Monitor Themeum’s official channels and security advisories for patches addressing CVE-2025-32223 and apply updates immediately upon release. 2. Until patches are available, restrict access to Tutor LMS administrative and sensitive functions to trusted users only, minimizing the number of accounts with elevated privileges. 3. Implement strict input validation and sanitization on any user-controlled keys or parameters that influence authorization decisions to prevent manipulation. 4. Conduct thorough access control audits and penetration testing focused on authorization mechanisms to identify and remediate similar weaknesses. 5. Employ network segmentation and firewall rules to limit external access to the LMS backend and administrative interfaces. 6. Enable detailed logging and monitoring of access attempts to detect suspicious activities indicative of exploitation attempts. 7. Educate LMS administrators and users about the risks of privilege escalation and encourage prompt reporting of anomalies.