CVE-2025-3634: Moodle: moodle allows course self-enrolment before completing mfa

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-25 · updated 2026-06-17
Weakness: CWE-287

Description

A security vulnerability was discovered in Moodle that allows students to enroll themselves in courses without completing all the necessary safety checks. Specifically, users can sign up for courses prematurely, even if they haven't finished two-step verification processes.

Affected products

Moodle: from 4.3.0 before 4.3.12; from 4.4.0 before 4.4.8; from 4.5.0 before 4.5.4 — fixed in 4.3.12, 4.4.8, 4.5.4

How to fix

Upgrade to a fixed version: Moodle 4.3.12, 4.4.8, 4.5.4. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2025-3634
https://bugzilla.redhat.com/show_bug.cgi?id=2359707

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