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GHSA-fmq9-58q4-xjw5

MEDIUM

GHSA-fmq9-58q4-xjw5 is a medium-severity (CVSS 4.3) Information Exposure vulnerability in moodle/moodle. O3 Security confirms whether GHSA-fmq9-58q4-xjw5 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Moodle allows attackers to discover hidden course names

Also known asCVE-2016-2154
Published
May 13, 2022
Updated
Feb 16, 2024
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed

Blast Radius

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

admin/tool/monitor/lib.php in Event Monitor in Moodle 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 does not consider the moodle/course:viewhiddencourses capability, which allows remote authenticated users to discover hidden course names by subscribing to a rule.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle2.8.0&&< 2.8.112.8.11
🐘Packagistmoodle/moodle2.9.0&&< 2.9.52.9.5
🐘Packagistmoodle/moodle3.0.0&&< 3.0.33.0.3

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. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update moodle/moodle to 2.8.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fmq9-58q4-xjw5 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-fmq9-58q4-xjw5 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-fmq9-58q4-xjw5. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

admin/tool/monitor/lib.php in Event Monitor in Moodle 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 does not consider the moodle/course:viewhiddencourses capability, which allows remote authenticated users to discover hidden course names by subscribing to a rule.
O3 Security · Impact-Aware SCA

Is GHSA-fmq9-58q4-xjw5 in your dependencies?

O3 detects GHSA-fmq9-58q4-xjw5 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.