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MEDIUM severity

Moodle Setting for blocked hosts list can be bypassed with multiple A record hostnamesGHSA-hpwm-84h5-vqr8

MEDIUM

GHSA-hpwm-84h5-vqr8 is a medium-severity (CVSS 6.5) vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.

Also known asCVE-2018-1043
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs74th percentile — riskier than 74% of all scored CVEsHighest risk
0.00%0.65%1.30%1.95%0.1%1.5%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

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

In Moodle 3.x, the setting for blocked hosts list can be bypassed with multiple A record hostnames.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodle≥ 3.2&&< 3.2.73.2.7composer require moodle/moodle:^3.2.7
🐘Packagistmoodle/moodle≥ 3.3&&< 3.3.43.3.4composer require moodle/moodle:^3.3.4
🐘Packagistmoodle/moodle≥ 3.4&&< 3.4.13.4.1composer require moodle/moodle:^3.4.1

Affected Products

1 product · 12 configurations
Application
moodlemoodle
12 versions
3.2.03.2.13.2.23.2.33.2.43.2.53.2.63.3.03.3.13.3.23.3.33.4.0

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 3.2.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hpwm-84h5-vqr8 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.

Frequently Asked Questions

In Moodle 3.x, the setting for blocked hosts list can be bypassed with multiple A record hostnames.
O3 Security · Impact-Aware SCA

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Moodle Setting for blocked hosts list can be bypassed…