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Moodle XSS Vulnerability

High severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Oct 6, 2023

Package

composer moodle/moodle (Composer)

Affected versions

>= 3.5.0, < 3.5.1
>= 3.4.0, < 3.4.4
>= 3.3.0, < 3.3.7
>= 3.2.0, < 3.2.10
>= 3.1.0, < 3.1.13

Patched versions

3.5.1
3.4.4
3.3.7
3.2.10
3.1.13

Description

A flaw was found in moodle before versions 3.5.1, 3.4.4, 3.3.7, 3.1.13. When a quiz question bank is imported, it was possible for the question preview that is displayed to execute JavaScript that is written into the question bank.

References

Published by the National Vulnerability Database Jul 10, 2018
Published to the GitHub Advisory Database May 13, 2022
Reviewed Jul 20, 2023
Last updated Oct 6, 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
Low
Integrity
Low
Availability
Low

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:L/I:L/A:L

EPSS score

0.240%
(62nd percentile)

Weaknesses

CVE ID

CVE-2018-10891

GHSA ID

GHSA-p7v9-gjrh-563x

Source code

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