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Moodle affected by a code injection vulnerability

High severity GitHub Reviewed Published Jan 23, 2026 to the GitHub Advisory Database • Updated Jan 26, 2026

Package

composer moodle/moodle (Composer)

Affected versions

>= 5.1.0-beta, < 5.1.1
>= 5.0.0-beta, < 5.0.4
>= 4.5.0-beta, < 4.5.8
>= 4.2.0-beta, < 4.4.12
< 4.1.22

Patched versions

5.1.1
5.0.4
4.5.8
4.4.12
4.1.22

Description

A flaw was found in Moodle. An attacker with access to the restore interface could trigger server-side execution of arbitrary code. This is due to insufficient validation of restore input, which leads to unintended interpretation by core restore routines. Successful exploitation could result in a full compromise of the Moodle application.

References

Published by the National Vulnerability Database Jan 23, 2026
Published to the GitHub Advisory Database Jan 23, 2026
Reviewed Jan 23, 2026
Last updated Jan 26, 2026

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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:N/S:U/C:H/I:H/A:H

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.
(8th percentile)

Weaknesses

Improper Control of Generation of Code ('Code Injection')

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Learn more on MITRE.

CVE ID

CVE-2025-67847

GHSA ID

GHSA-xvmh-25jw-gmmm

Source code

Credits

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