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Moodle broken access control when setting calendar event type

Moderate severity GitHub Reviewed Published May 31, 2024 to the GitHub Advisory Database • Updated Jul 5, 2024

Package

composer moodle/moodle (Composer)

Affected versions

>= 4.3.0, < 4.3.4
>= 4.2.0, < 4.2.7
< 4.1.10

Patched versions

4.3.4
4.2.7
4.1.10

Description

Incorrect validation of allowed event types in a calendar web service made it possible for some users to create events with types/audiences they did not have permission to publish to.

References

Published by the National Vulnerability Database May 31, 2024
Published to the GitHub Advisory Database May 31, 2024
Reviewed Jun 4, 2024
Last updated Jul 5, 2024

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
High
User interaction
Required
Scope
Changed
Confidentiality
None
Integrity
High
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:H/UI:R/S:C/C:N/I:H/A:N

EPSS score

0.043%
(10th percentile)

Weaknesses

CVE ID

CVE-2024-33996

GHSA ID

GHSA-4qww-rxq6-x7gf

Source code

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