Improper access control in Moodle - CVE-2021-20283

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Main Vulnerability Database Vulnerabilities #VU51480

Improper access control in Moodle - CVE-2021-20283

Published: March 15, 2021


Vulnerability identifier: #VU51480
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20283
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. The web service responsible for fetching other users' enrolled courses did not validate that the requesting user had permission to view that information in each course. A remote user can gain unauthorized access to the application.


Affected software

Moodle
Fedora
moodle

How to mitigate CVE-2021-20283

Install updates from vendor's website.

Moodle - addressed in versions 3.5.17, 3.8.8, 3.9.5, 3.10.2
moodle - addressed in versions 3.8.8-1.fc32, 3.9.5-1.fc33, 3.10.2-1.fc34

External References

Related Security Bulletins