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Cross-Site Request Forgery in Moodle

Moderate severity GitHub Reviewed Published Nov 23, 2022 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

composer moodle/moodle (Composer)

Affected versions

>= 3.9.0, < 3.9.18
>= 3.11.0, < 3.11.11
>= 4.0.0, < 4.0.5

Patched versions

3.9.18
3.11.11
4.0.5

Description

A vulnerability was found in Moodle which exists due to insufficient validation of the HTTP request origin in course redirect URL. A user's CSRF token was unnecessarily included in the URL when being redirected to a course they have just restored. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website. This flaw allows an attacker to perform cross-site request forgery attacks.

References

Published by the National Vulnerability Database Nov 23, 2022
Published to the GitHub Advisory Database Nov 23, 2022
Reviewed Nov 23, 2022
Last updated Feb 1, 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
None
User interaction
Required
Scope
Unchanged
Confidentiality
Low
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:R/S:U/C:L/I:L/A:N

EPSS score

0.209%
(60th percentile)

Weaknesses

CVE ID

CVE-2022-45149

GHSA ID

GHSA-8v23-w4w5-w83c

Source code

No known source code
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