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Moodle Portfolio script allows instantiation of class chosen by user

High severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Apr 23, 2024

Package

composer moodle/moodle (Composer)

Affected versions

>= 3.1, < 3.1.12
>= 3.2, < 3.2.9
>= 3.3, < 3.3.6
>= 3.4, < 3.4.3

Patched versions

3.1.12
3.2.9
3.3.6
3.4.3

Description

An issue was discovered in Moodle 3.x. By substituting URLs in portfolios, users can instantiate any class. This can also be exploited by users who are logged in as guests to create a DDoS attack.

References

Published by the National Vulnerability Database May 25, 2018
Published to the GitHub Advisory Database May 14, 2022
Reviewed Apr 23, 2024
Last updated Apr 23, 2024

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

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:N/I:H/A:H

EPSS score

0.083%
(37th percentile)

Weaknesses

CVE ID

CVE-2018-1137

GHSA ID

GHSA-vxqh-mx28-7ghw

Source code

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