The Backup Migration plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 2.0.0. This is due to a missing capability check on the 'initializeOfflineAjax' function and lack of proper nonce verification. The endpoint only validates against hardcoded tokens which are publicly exposed in the plugin's JavaScript.
This makes it possible for unauthenticated attackers to trigger the backup upload queue processing, potentially causing unexpected backup transfers to configured cloud storage targets and resource exhaustion.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://plugins.trac.wordpress.org/browser/backup-backup/trunk/includes/ajax_of…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/backup-backup/trunk/includes/offline…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?old=3386897&old_path=backup-backup…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/a2a41a15-0743-48cc-8c…
security@wordfence.com