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LOW severity

CVE-2023-5542 — moodle

LOWFix: moodle/moodle@b0bb97e

CVE-2023-5542 is a low-severity (CVSS 3.3) CWE-284 vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.

Moodle: students can view other users in "only see own membership" groups

Also known asBIT-moodle-2023-5542GHSA-8mm2-m2gp-c6x2
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 29, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-5542.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk+0.04%
Lower risk than most CVEs41th percentile — riskier than 41% of all scored CVEsHighest risk
0.00%0.33%0.65%0.98%0.3%0.5%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

1 pkg affected
🐘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

Students in "Only see own membership" groups could see other students in the group, which should be hidden.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmoodle/moodleall versions4.3.0-rc2composer require moodle/moodle:^4.3.0-rc2

Affected Products

3 products · 3 configurations
Application
extra packages for enterprise linuxfedoraproject
1 version
7.0
OS
fedorafedoraproject
1 version
38
Application
moodlemoodle
1 version
4.2.2

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 4.3.0-rc2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-5542 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

Students in "Only see own membership" groups could see other students in the group, which should be hidden.
O3 Security · Impact-Aware SCA

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CVE-2023-5542: moodle — Fixed in 4.3.0-rc2