Missing Authorization in Moodle - #VU148892
Published: September 10, 2026
Vulnerability identifier: #VU148892
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to missing check to validate a group belonged to a course. A remote user with teacher privilege can add users to groups in courses that the teacher could not otherwise access.
Affected software
Moodle
Remediation
Install updates from vendor's website.
Moodle - addressed in versions 5.1.6, 5.2.2