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MEDIUM severity

CVE-2019-10133 — moodle

MEDIUMFix: moodle/moodle@5a89ac9

CVE-2019-10133 is a medium-severity (CVSS 6.1) Open Redirect vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.

Moodle Open Redirect Vulnerability

Also known asGHSA-5xp2-rv4h-mm2q
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk-0.00%
Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk
0.00%0.47%0.93%1.40%0.2%0.9%Apr 26Aug 26Oct 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

A flaw was found in Moodle before 3.7, 3.6.4, 3.5.6, 3.4.9 and 3.1.18. The form to upload cohorts contained a redirect field, which was not restricted to internal URLs.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle≥ 3.6.0&&< 3.6.43.6.4composer require moodle/moodle:^3.6.4
🐘Packagistmoodle/moodle≥ 3.5.0&&< 3.5.63.5.6composer require moodle/moodle:^3.5.6
🐘Packagistmoodle/moodle≥ 3.4.0&&< 3.4.93.4.9composer require moodle/moodle:^3.4.9
🐘Packagistmoodle/moodleall versions3.1.18composer require moodle/moodle:^3.1.18

Affected Products

1 product · 4 configurations
Application
moodlemoodle
≥ 3.6.0 && ≤ 3.6.3
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 3.6.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-10133 is resolved across your whole dependency graph.

  3. Workarounds

    Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Frequently Asked Questions

A flaw was found in Moodle before 3.7, 3.6.4, 3.5.6, 3.4.9 and 3.1.18. The form to upload cohorts contained a redirect field, which was not restricted to internal URLs.
O3 Security · Impact-Aware SCA

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CVE-2019-10133: moodle — Fixed in 3.6.4