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Moodle provides calendar-event data without considering whether an activity is hidden

Moderate severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Jan 26, 2024

Package

composer moodle/moodle (Composer)

Affected versions

< 2.7.13
>= 2.8.0, < 2.8.11
>= 2.9.0, < 2.9.5
>= 3.0.0, < 3.0.3

Patched versions

2.7.13
2.8.11
2.9.5
3.0.3

Description

calendar/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 provides calendar-event data without considering whether an activity is hidden, which allows remote authenticated users to obtain sensitive information via a web-service request.

References

Published by the National Vulnerability Database May 22, 2016
Published to the GitHub Advisory Database May 13, 2022
Last updated Jan 26, 2024
Reviewed Jan 26, 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
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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.152%
(52nd percentile)

Weaknesses

CVE ID

CVE-2016-2156

GHSA ID

GHSA-h8vc-v44p-5r2q

Source code

Credits

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