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MEDIUM severity

Missing permission check in MoodleGHSA-2m72-m5cw-3g9h

MEDIUM

GHSA-2m72-m5cw-3g9h is a medium-severity (CVSS 4.3) CWE-863 vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.

Also known asBIT-moodle-2021-20283CVE-2021-20283
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk+0.04%
Lower risk than most CVEs66th percentile — riskier than 66% of all scored CVEsHighest risk
0.00%0.54%1.07%1.61%0.2%1.1%1.1%1.1%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected
🐘moodle/moodle🐘moodle/moodle🐘moodle/moodle🐘moodle/moodle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle≥ 3.10.0&&< 3.10.23.10.2composer require moodle/moodle:^3.10.2
🐘Packagistmoodle/moodle≥ 3.9.0&&< 3.9.53.9.5composer require moodle/moodle:^3.9.5
🐘Packagistmoodle/moodle≥ 3.8.0&&< 3.8.83.8.8composer require moodle/moodle:^3.8.8
🐘Packagistmoodle/moodleall versions3.5.17composer require moodle/moodle:^3.5.17

Affected Products

2 products · 6 configurations
OS
fedorafedoraproject
2 versions
3234
Application
moodlemoodle
≥ 3.10.0 && < 3.10.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update moodle/moodle to 3.10.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2m72-m5cw-3g9h is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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Missing permission check in Moodle (Medium 4.3)