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Moodle Improper Access Control vulnerability

Moderate severity GitHub Reviewed Published Nov 9, 2023 to the GitHub Advisory Database • Updated Nov 17, 2023

Package

composer moodle/moodle (Composer)

Affected versions

< 4.3.0-rc2

Patched versions

4.3.0-rc2

Description

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

References

Published by the National Vulnerability Database Nov 9, 2023
Published to the GitHub Advisory Database Nov 9, 2023
Reviewed Nov 10, 2023
Last updated Nov 17, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.057%
(25th percentile)

Weaknesses

CVE ID

CVE-2023-5542

GHSA ID

GHSA-8mm2-m2gp-c6x2

Source code

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