CVE-2025-3644 is an authorization vulnerability identified in Moodle, a widely used open-source learning management system (LMS). The issue arises from inadequate permission checks that allow users with certain privileges to delete course sections without proper authorization. Specifically, users who should not have modification rights over course sections can exploit this flaw to remove them, potentially disrupting course structure and content integrity. The affected versions include Moodle 4.1.0, 4.3.0, 4.4.0, and 4.5.0. The vulnerability is exploitable remotely over the network (AV:N), requires low privileges (PR:L), and does not require user interaction (UI:N). The CVSS 3.1 base score is 4.3, indicating medium severity, with impact limited to integrity (I:L) and no impact on confidentiality or availability. No public exploits have been reported yet, but the flaw could be leveraged by authenticated users to manipulate course content maliciously or disrupt educational activities. The root cause is insufficient authorization validation in the course section deletion functionality, which should enforce stricter permission checks to prevent unauthorized modifications.

The primary impact of CVE-2025-3644 is on the integrity of educational content within Moodle platforms. Unauthorized deletion of course sections can lead to loss of critical instructional material, confusion among students and educators, and disruption of learning processes. While confidentiality and availability remain unaffected, the integrity compromise can undermine trust in the LMS and cause administrative overhead to restore deleted content. Organizations relying on Moodle for course delivery, especially large educational institutions, may face operational challenges and reputational damage if attackers exploit this vulnerability. Since exploitation requires authenticated access with low privileges, insider threats or compromised user accounts pose a significant risk. The absence of known exploits reduces immediate risk, but the vulnerability remains a concern until patched.

To mitigate CVE-2025-3644, organizations should promptly apply security updates or patches released by Moodle addressing this authorization flaw. If patches are not immediately available, administrators should review and tighten role-based access controls, ensuring that only authorized users have permissions to modify or delete course sections. Implementing strict auditing and monitoring of course modification activities can help detect unauthorized attempts. Additionally, enforcing strong authentication mechanisms and regularly reviewing user privileges can reduce the risk of exploitation by compromised accounts. Network segmentation and limiting access to the Moodle platform to trusted users further reduce exposure. Educating users about the importance of safeguarding credentials and recognizing suspicious activity is also recommended. Finally, organizations should maintain regular backups of course content to enable recovery from unauthorized deletions.