What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-23 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• inisev BackupBliss – Backup & Migration with Free Cloud Storage: before 1.4.0 — fixed in 1.4.0

How to fix

Upgrade to a fixed version: inisev BackupBliss – Backup & Migration with Free Cloud Storage 1.4.0. Check the vendor advisory for mitigations.

References

• 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://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://www.wordfence.com/threat-intel/vulnerabilities/id/0a3ae696-f67d-4ed2-b307-d2f36b6f188c?source=cve

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