CVE-2026-18216
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductBackup Migration
PublishedAug 15, 2026
First seenAug 15, 2026
Weakness typeCWE-287Improper authentication
How to fix
Update
- Backup Migration2.1.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Backup Migration | v < 2.1.7 | 2.1.7 |
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