CVE-2026-26031 identifies an incorrect authorization vulnerability in the Frappe Learning Management System (LMS) prior to version 2.44.0. Frappe LMS is a platform designed to help users organize and deliver educational content. The vulnerability arises because the system improperly restricts access controls, allowing unauthorized users to retrieve the complete list of enrolled students' email addresses in batches. This exposure of personally identifiable information (PII) violates confidentiality principles and could facilitate phishing, social engineering, or other targeted attacks. The vulnerability is classified under CWE-863, which pertains to insufficient authorization checks that allow unauthorized access to resources. The CVSS 4.0 vector indicates the attack requires network access with low privileges but no authentication or user interaction, making it relatively easy to exploit. However, the impact is limited to information disclosure without affecting system integrity or availability. The issue was addressed and fixed in Frappe LMS version 2.44.0. No known exploits have been reported in the wild, suggesting limited active exploitation. The vulnerability primarily affects organizations using vulnerable versions of Frappe LMS, especially those managing sensitive student data.

The primary impact of CVE-2026-26031 is the unauthorized disclosure of enrolled students' email addresses, which compromises user confidentiality. This exposure can lead to increased risks of phishing attacks, targeted social engineering, and privacy violations. While the vulnerability does not affect system integrity or availability, the leakage of personal data can damage the reputation of educational institutions and erode trust among users. Organizations relying on Frappe LMS for managing student information may face compliance issues with data protection regulations such as GDPR or FERPA if this vulnerability is exploited. The ease of exploitation without authentication increases the risk surface, especially for publicly accessible LMS instances. However, the low CVSS score and absence of known active exploits suggest the threat is currently limited in scope and impact.

To mitigate CVE-2026-26031, organizations should immediately upgrade Frappe LMS to version 2.44.0 or later, where the authorization flaw is corrected. In addition to patching, administrators should audit access controls and ensure that sensitive student data is not exposed to unauthorized users. Implement network-level restrictions such as IP whitelisting or VPN access for LMS administration interfaces to reduce exposure. Employ monitoring and alerting for unusual access patterns or bulk data retrieval attempts from the LMS. Educate staff and users about phishing risks stemming from potential data leaks. Where possible, limit the amount of personally identifiable information displayed or accessible via the LMS interface. Regularly review and test authorization mechanisms to prevent similar issues. Finally, maintain an incident response plan to address potential data exposure events promptly.