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Moodle contains Stored XSS via ID number user profile field

Moderate severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jul 13, 2023

Package

composer moodle/moodle (Composer)

Affected versions

>= 3.10, <= 3.10.1
>= 3.9, <= 3.9.4
>= 3.8, <= 3.8.7
>= 3.5, <= 3.5.16

Patched versions

3.10.2
3.9.5
3.8.8
3.5.17

Description

The ID number user profile field required additional sanitizing to prevent a stored XSS risk in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.

References

Published by the National Vulnerability Database Mar 15, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jul 13, 2023
Last updated Jul 13, 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
Low
User interaction
Required
Scope
Changed
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:L/UI:R/S:C/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.
(36th percentile)

Weaknesses

CVE ID

CVE-2021-20279

GHSA ID

GHSA-h7h6-fwpv-ggvx

Source code

No known source code
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