by Michael Hawkins.

A flaw in email-based multi-factor authentication made it possible for a user to bypass another user's MFA token check if using the email factor. Note: Valid login credentials (such as username and password) were still required to log into the account.

Severity/Risk: Serious

Versions affected: 5.2, 5.1 to 5.1.4, 5.0 to 5.0.7, 4.5 to 4.5.11 and earlier unsupported versions

Versions fixed: 5.2.1, 5.1.5, 5.0.8 and 4.5.12

Reported by: Brendan Heywood

CVE identifier: Pending (this will be updated once available)

Changes (main): http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88767

Tracker issue: MDL-88767 Email-based MFA bypass