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LOW severity

Insufficient user authorization in MoodleGHSA-m434-m5pv-p35w

LOWFix: moodle/moodle@2ee2731

GHSA-m434-m5pv-p35w is a low-severity (CVSS 3.8) 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-2022-0333CVE-2022-0333
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs46th percentile — riskier than 46% of all scored CVEsHighest risk
0.00%0.36%0.71%1.07%0.3%0.6%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-m434-m5pv-p35w by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

3 pkgs affected
🐘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

A flaw was found in Moodle in versions 3.11 to 3.11.4, 3.10 to 3.10.8, 3.9 to 3.9.11 and earlier unsupported versions. The calendar:manageentries capability allowed managers to access or modify any calendar event, but should have been restricted from accessing user level events.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle≥ 3.11&&< 3.11.53.11.5composer require moodle/moodle:^3.11.5
🐘Packagistmoodle/moodle≥ 3.10&&< 3.10.83.10.8composer require moodle/moodle:^3.10.8
🐘Packagistmoodle/moodle≥ 3.9&&< 3.9.113.9.11composer require moodle/moodle:^3.9.11

Affected Products

1 product · 4 configurations
Application
moodlemoodle
≥ 3.11.0 && ≤ 3.8.9
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 3.11.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m434-m5pv-p35w 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

A flaw was found in Moodle in versions 3.11 to 3.11.4, 3.10 to 3.10.8, 3.9 to 3.9.11 and earlier unsupported versions. The calendar:manageentries capability allowed managers to access or modify any calendar event, but should have been restricted from accessing user level events.
O3 Security · Impact-Aware SCA

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Insufficient user authorization in Moodle (Low 3.8)