CVE-2021-20283

Name: CVE-2021-20283
Creator: NVD / NIST
Published: 2021-03-15T22:15:13.373+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2021-20283 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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 in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

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 in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

1.07%

60.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Moodle	Moodle	>= 3.5.0, < 3.5.17
Moodle	Moodle	>= 3.8.0, < 3.8.8
Moodle	Moodle	>= 3.9.0, < 3.9.5
Moodle	Moodle	>= 3.10.0, < 3.10.2
Fedoraproject	Fedora	32
Fedoraproject	Fedora	34

References

Timeline

Published: Mar 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20283?

How severe is CVE-2021-20283?

CVE-2021-20283 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20283?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20283?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST