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Moodle Inserts Sensitive Information Into Sent Data

Moderate severity GitHub Reviewed Published Feb 3, 2026 to the GitHub Advisory Database • Updated Feb 3, 2026

Package

composer moodle/moodle (Composer)

Affected versions

< 4.1.22
>= 4.4.0-beta, < 4.4.12
>= 4.5.0-beta, < 4.5.8
>= 5.0.0-beta, < 5.0.4
>= 5.1.0-beta, < 5.1.1

Patched versions

4.1.22
4.4.12
4.5.8
5.0.4
5.1.1

Description

A flaw was found in moodle. During anonymous assignment submissions, user identifiers were inadvertently exposed in URLs. This data exposure allows unauthorized viewers to see internal user IDs, compromising the intended anonymity and potentially leading to information disclosure.

References

Published by the National Vulnerability Database Feb 3, 2026
Published to the GitHub Advisory Database Feb 3, 2026
Reviewed Feb 3, 2026
Last updated Feb 3, 2026

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
None
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:N/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.
(3rd percentile)

Weaknesses

Insertion of Sensitive Information Into Sent Data

The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. Learn more on MITRE.

CVE ID

CVE-2025-67857

GHSA ID

GHSA-8jrv-wx83-w3xj

Source code

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