BackupBliss – Backup & Migration with Free Cloud Storage: A security weakness
BackupBliss – Backup & Migration with Free Cloud Storage is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 2.0.0.
- Component
- BackupBliss – Backup & Migration with Free Cloud Storage
- Plugin slug
backup-backup- Affected
- <= 2.0.0
- Safe version
> 2.0.0- Published
- Apr 07, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Apr 07, 2026 and is one of 10 known issues for this plugin.
Update, patch or deactivate.
Update BackupBliss – Backup & Migration with Free Cloud Storage to a release after 2.0.0, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L