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

published 2023-11-09 2 y ago modified 2026-09-10 1 mo ago also BIT-moodle-2023-5542 , EUVD-2023-2926 , GHSA-8mm2-m2gp-c6x2

cvss: 3.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

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

Patch / fix

fixed in 2 links 4

packagist moodle/moodle 4.3.0-rc2
bitnami moodle 4.2.3

github.com/moodle/moodle@b0bb97e commit
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79213 patch
bugzilla.redhat.com/show_bug.cgi?id=2243441 advisory
moodle.org/mod/forum/discuss.php?d=451583 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-5542 updated 2025-11-21 cvss 3.3

moodle: Students can view other users in "Only see own membership" groups

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-05-21)

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.3	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
OSV	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	moodle/moodle	<4.3.0-rc2	4.3.0-rc2
bitnami	moodle	>=4.2.2, <4.2.3	4.2.3

Affected products

moodle moodle

Classification

Weakness

CWE-284 Improper Access Control
CWE-668 Exposure of Resource to Wrong Sphere

References

git.moodle.org /gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79213
web, patch
bugzilla.redhat.com /show_bug.cgi?id=2243441
issue-tracking, web, patch, third-party-advisory, advisory
moodle.org /mod/forum/discuss.php?d=451583
web, patch, vendor-advisory, advisory
github.com /moodle/moodle/commit/b0bb97ee3b481dd85d8f1ed3612f70c9d1939014
web
nvd.nist.gov /vuln/detail/CVE-2023-5542
advisory, web
github.com /moodle/moodle
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary