CVE-2026-18216
Received Received - Intake

BaseFortify

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: WPScan

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.

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Meta Information

Published
2026-08-15
Last Modified
2026-08-15
Generated
2026-08-15
AI Q&A
2026-08-15
EPSS Evaluated
N/A
NVD
CVE-2026-18216
EUVD
EUVD-2026-59591

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
backup_migration backup_migration to 2.1.7 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the Backup Migration WordPress plugin versions before 2.1.7. It allows an administrator of one site in a multisite network to gain unauthorized long-term access as an administrator of another site in the same network without valid credentials. This bypasses two-factor authentication due to improper restrictions on a post-restore automatic login mechanism.

Impact Analysis

If you use a multisite WordPress network with the affected plugin version, an attacker with admin access to one site could take over other sites in the network. This could lead to data theft, unauthorized modifications, or complete site compromise without needing passwords or 2FA codes.

Compliance Impact

This vulnerability could violate compliance requirements by enabling unauthorized access to sensitive data across multiple sites. GDPR and HIPAA mandate strict access controls and data protection; such a breach could result in regulatory penalties, loss of trust, and legal consequences due to compromised user data.

Mitigation Strategies

Update the Backup Migration WordPress plugin to version 2.1.7 or later to address the improper session handling issue.

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