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Moodle reflected XSS via H5P error message

Moderate severity GitHub Reviewed Published Nov 11, 2024 to the GitHub Advisory Database • Updated Apr 23, 2025

Package

composer moodle/moodle (Composer)

Affected versions

< 4.1.12
>= 4.2.0-beta, < 4.2.9
>= 4.3.0-beta, < 4.3.6
>= 4.4.0-beta, < 4.4.2

Patched versions

4.1.12
4.2.9
4.3.6
4.4.2

Description

A flaw was found in moodle. H5P error messages require additional sanitizing to prevent a reflected cross-site scripting (XSS) risk.

References

Published by the National Vulnerability Database Nov 11, 2024
Published to the GitHub Advisory Database Nov 11, 2024
Reviewed Apr 23, 2025
Last updated Apr 23, 2025

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

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(70th percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2024-43439

GHSA ID

GHSA-hjgc-jxjc-8v9j

Source code

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