CVE-2026-18216

Backup Migration < 2.1.7 - Admin+ Privilege Escalation via Post-Restore Auto-Login

Published Aug 15, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions backup Migration
Vendors & Products Wordpress-extensions
Wordpress-extensions backup Migration
Type Values Removed Values Added
Weaknesses CWE-284
CWE-640
Type Values Removed Values Added
Weaknesses CWE-287
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-284
CWE-640
Type Values Removed Values Added
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.
Title Backup Migration < 2.1.7 - Admin+ Privilege Escalation via Post-Restore Auto-Login
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 17, 2026, 8:36 PM
Reserved
Jul 29, 2026, 8:51 AM
Status
Deferred
Published
Aug 15, 2026, 6:17 AM
Modified
Aug 26, 2026, 4:30 PM