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MEDIUM severity

CVE-2021-32472 — moodle

MEDIUM

CVE-2021-32472 is a medium-severity (CVSS 4.3) CWE-862 vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.

Moodle Exposure of Sensitive Information to an Unauthorized Actor

Also known asBIT-moodle-2021-32472GHSA-454r-jccq-96q8
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 ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs54th percentile — riskier than 54% of all scored CVEsHighest risk
0.00%0.42%0.85%1.27%0.3%0.8%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2021-32472 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 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

Teachers exporting a forum in CSV format could receive a CSV of forums from all courses in some circumstances. Moodle versions 3.10 to 3.10.3, 3.9 to 3.9.6 and 3.8 to 3.8.8 are affected.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle≥ 3.8.0&&< 3.8.93.8.9composer require moodle/moodle:^3.8.9
🐘Packagistmoodle/moodle≥ 3.9.0&&< 3.9.73.9.7composer require moodle/moodle:^3.9.7
🐘Packagistmoodle/moodle≥ 3.10.0&&< 3.10.43.10.4composer require moodle/moodle:^3.10.4

Affected Products

1 product · 3 configurations
Application
moodlemoodle
≥ 3.10.0 && < 3.10.4
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 3.8.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-32472 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

Teachers exporting a forum in CSV format could receive a CSV of forums from all courses in some circumstances. Moodle versions 3.10 to 3.10.3, 3.9 to 3.9.6 and 3.8 to 3.8.8 are affected.
O3 Security · Impact-Aware SCA

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CVE-2021-32472: moodle — Fixed in 3.8.9