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MEDIUM severity

Moodle stored Cross-site ScriptingGHSA-5wjh-v7c8-wrhx

MEDIUM

GHSA-5wjh-v7c8-wrhx is a medium-severity (CVSS 5.4) OS Command Injection vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.

Also known asBIT-moodle-2021-32475CVE-2021-32475
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 5, 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 CVEs48th percentile — riskier than 48% of all scored CVEsHighest risk
0.00%0.36%0.73%1.09%0.4%0.6%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

ID numbers displayed in the quiz grading report required additional sanitizing to prevent a stored XSS risk. Moodle 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8, 3.5 to 3.5.17 and earlier unsupported versions are affected.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle≥ 3.5&&< 3.5.183.5.18composer require moodle/moodle:^3.5.18
🐘Packagistmoodle/moodle≥ 3.8&&< 3.8.93.8.9composer require moodle/moodle:^3.8.9
🐘Packagistmoodle/moodle≥ 3.9&&< 3.9.73.9.7composer require moodle/moodle:^3.9.7
🐘Packagistmoodle/moodle≥ 3.10&&< 3.10.43.10.4composer require moodle/moodle:^3.10.4

Affected Products

1 product · 4 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 3.5.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5wjh-v7c8-wrhx is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

ID numbers displayed in the quiz grading report required additional sanitizing to prevent a stored XSS risk. Moodle 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8, 3.5 to 3.5.17 and earlier unsupported versions are affected.
O3 Security · Impact-Aware SCA

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Moodle stored Cross-site Scripting (Medium 5.4)