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Moodle Improper Access Control vulnerability

High severity GitHub Reviewed Published Feb 17, 2023 to the GitHub Advisory Database • Updated Mar 2, 2023

Package

composer moodle/moodle (Composer)

Affected versions

< 3.9.19
>= 3.10.0, < 3.11.12
>= 4.0.0-beta, < 4.0.6
>= 4.1.0-beta, < 4.1.1

Patched versions

3.9.19
3.11.12
4.0.6
4.1.1

Description

The vulnerability was found Moodle which exists due to insufficient limitations on the "start page" preference. A remote attacker can set that preference for another user. The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

References

Published by the National Vulnerability Database Feb 17, 2023
Published to the GitHub Advisory Database Feb 17, 2023
Last updated Mar 2, 2023
Reviewed Mar 2, 2023

Severity

High

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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
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:N/UI:N/S:U/C:H/I:L/A:N

EPSS score

0.267%
(68th percentile)

Weaknesses

CVE ID

CVE-2023-23923

GHSA ID

GHSA-32jc-9p58-p82x

Source code

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