CVE-2026-18216: Backup Migration < 2.1.7 - Admin+ Privilege Escalation via Post-Restore Auto-Login

Published Aug 15, 2026
·
Updated

The Backup Migration WordPress plugin before 2.1.7 does not properly restrict a post-restore automatic login mechanism, allowing a user who administers one site of a multisite network to obtain a long-lived authenticated session as an administrator of another site in the same network, without credentials and bypassing two-factor authentication.

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Backup Migration (WordPress plugin) to a version that resolves this vulnerability.

    Fixed in 2.1.7

Event History

Aug 15, 2026
CVE Published
via MITRE·06:00 AM
Data Sourced
via MITRE·06:00 AM
DescriptionWeakness
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