Skip to content

Moodle Vulnerable to Reflected Cross-site Scripting

Moderate severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Sep 12, 2023

Package

composer moodle/moodle (Composer)

Affected versions

>= 3.10, < 4.0.0-beta

Patched versions

4.0.0-beta

Description

It was found in Moodle before version 4.0.0-beta that some search inputs were vulnerable to reflected Cross-site Scripting (XSS) due to insufficient escaping of search queries.

References

Published by the National Vulnerability Database Jan 28, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jul 10, 2023
Last updated Sep 12, 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

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(37th percentile)

Weaknesses

CVE ID

CVE-2021-20183

GHSA ID

GHSA-xhfx-rm8q-c3xv

Source code

No known source code
Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.