CVE-2025-12270 identifies a vulnerability in LearnHouse, an educational platform, specifically within the Student Assignment Submission Handler component. The flaw exists in an API endpoint at /api/v1/assignments/{assignment_id}/tasks/{task_id}/sub_file, where improper control of resource identifiers allows attackers to manipulate these identifiers remotely. This manipulation could lead to unauthorized access or modification of assignment-related resources. The vulnerability does not require user interaction or authentication, increasing its risk profile. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P) indicates network attack vector, low attack complexity, no privileges or user interaction needed, and partial impact on confidentiality. The vendor uses continuous delivery with rolling releases, complicating version tracking and patch availability. Despite early vendor notification, no response or patch has been provided, and no public exploits have been observed yet. This vulnerability could be leveraged to access or alter student assignment data, potentially impacting data integrity and confidentiality within educational institutions using LearnHouse.

For European organizations, particularly educational institutions and e-learning service providers using LearnHouse, this vulnerability poses a risk of unauthorized access or manipulation of student assignment data. Confidentiality could be compromised if attackers access sensitive student submissions or grading information. Integrity may be affected if attackers alter assignment data, potentially impacting academic records and evaluation processes. Availability impact is minimal as the vulnerability does not directly enable denial-of-service conditions. The ease of remote exploitation without authentication increases the threat level, especially in environments with exposed API endpoints. This could lead to reputational damage, regulatory non-compliance (e.g., GDPR breaches due to unauthorized data access), and operational disruptions in academic workflows. Organizations relying on LearnHouse should prioritize detection and mitigation to prevent exploitation.

1. Implement strict validation and sanitization of all resource identifiers in API requests to prevent unauthorized manipulation. 2. Enforce robust authentication and authorization mechanisms on the affected API endpoints, ensuring only legitimate users can access or modify assignment resources. 3. Apply network-level access controls such as IP whitelisting and API gateways to restrict access to the submission handler endpoints. 4. Monitor API usage logs for anomalous patterns indicative of exploitation attempts, including unusual resource identifier values or access frequencies. 5. Engage with the vendor or community to obtain patches or updates as they become available, despite the current lack of response. 6. Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block suspicious API requests targeting resource identifiers. 7. Educate development and security teams about secure API design principles to prevent similar vulnerabilities in continuous delivery environments. 8. Conduct regular security assessments and penetration testing focused on API endpoints handling sensitive educational data.