What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
BackupBliss versions 2.0.0 and earlier lack proper authorization checks, allowing unauthenticated attackers to disrupt the backup service. An attacker can send network requests without credentials to trigger a denial-of-service condition. No user interaction is required. Sites running affected versions should update immediately.
What an attacker can do
03Attacker Capabilities
Disrupt backup operations without authentication by sending crafted network requests.
Potential impact on your site
04Site Impact
Backup service becomes unavailable, preventing data protection and recovery capabilities.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
April 7, 2026
CVE published
April 8, 2026
Record updated
