CVE-2026-25876 is a vulnerability classified under CWE-862 (Missing Authorization) affecting PlaciPy, a placement management system used by educational institutions. Specifically, in version 1.0.0, the backend route handling assessment results (backend/src/routes/results.routes.ts) verifies that a user is authenticated but fails to enforce object-level authorization controls. This means that while users must be logged in, the system does not check whether the user owns or is permitted to view the specific assessment results requested. Consequently, an authenticated user can query the API endpoint to retrieve all assessment results, not just their own or those they are authorized to see. This leads to unauthorized disclosure of potentially sensitive student data and assessment outcomes. The CVSS 4.0 base score is 5.3 (medium severity), reflecting network exploitability (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and limited impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). No patches or known exploits are currently available, but the vulnerability represents a significant privacy risk. The flaw stems from a lack of proper ownership checks in the application logic, a common authorization design weakness. Remediation requires adding strict object-level authorization checks to ensure users can only access data they are entitled to view.

For European organizations, particularly educational institutions using PlaciPy 1.0.0, this vulnerability poses a risk of unauthorized data disclosure. Exposure of assessment results can violate student privacy rights and data protection laws such as the GDPR, potentially leading to regulatory penalties and reputational damage. The integrity of assessment data could also be questioned if unauthorized users can access or manipulate results. Although availability is not directly impacted, the breach of confidentiality and integrity can undermine trust in the institution's IT systems. The vulnerability could be exploited by insiders or external attackers who gain authenticated access, making it a concern for both internal threat actors and compromised accounts. Given the sensitive nature of educational data, the impact extends beyond technical loss to legal and compliance consequences in Europe.

Organizations should immediately review and update the authorization logic in PlaciPy, specifically enforcing strict object-level ownership checks on all routes returning assessment results. This includes verifying that the authenticated user is authorized to access each requested data object before returning it. Implement role-based access controls (RBAC) or attribute-based access controls (ABAC) as appropriate to restrict data access. Conduct thorough code audits and penetration testing focused on authorization bypass scenarios. Monitor access logs for unusual patterns such as bulk data requests or access to multiple unrelated student records. If possible, isolate or restrict access to the vulnerable version of PlaciPy until patches or updates are available. Educate users on the importance of account security to prevent unauthorized access through compromised credentials. Finally, ensure compliance with GDPR by documenting the vulnerability, response actions, and notifying affected individuals if a data breach occurs.