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High, CVSS 8.8

Moodle Incorrect Authorization vulnerability

CVE-2020-14321GHSA-9q29-jcjw-fw7h

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (moodle/moodle 3.9.1, 3.8.4, 3.7.7, 3.5.13), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist moodle/moodle

    Affected
    >= 3.9.0-beta, < 3.9.1>= 3.8.0-beta, < 3.8.4>= 3.6.0-beta, < 3.7.7< 3.5.13
    Fixed in
    3.7.7, 3.8.4, 3.5.13, 3.9.1

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2020-14321: 15.99% estimated exploitation activity in the next 30 days; percentile 96.91 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

In Moodle before 3.9.1, 3.8.4, 3.7.7 and 3.5.13, teachers of a course were able to assign themselves the manager role within that course.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-9q29-jcjw-fw7h

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2020-14321

Advisory: Moodle Incorrect Authorization vulnerability
IDs: CVE-2020-14321, GHSA-9q29-jcjw-fw7h
Record: https://patchnext.com/advisories/cve-2020-14321 (revision 1, source checked 26 Oct 2026, 14:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: moodle/moodle 3.9.1, 3.8.4, 3.7.7, 3.5.13. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist moodle/moodle: affected >= 3.9.0-beta, < 3.9.1; >= 3.8.0-beta, < 3.8.4; >= 3.6.0-beta, < 3.7.7; < 3.5.13; fixed in 3.7.7, 3.8.4, 3.5.13, 3.9.1

## Suggested inspection (read-only)
- Packagist moodle/moodle: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on moodle/moodle.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-9q29-jcjw-fw7h (GitHub-reviewed advisory GHSA-9q29-jcjw-fw7h lists affected ranges: Packagist moodle/moodle >=3.9.0-beta =3.8.0-beta =3.6.0-beta =0 <3.5.13)

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