WordPress security changelog
HIGH CVE-2026-6227 Deferred

BackWPup – WordPress Backup & Restore Plugin: Filesystem traversal

BackWPup – WordPress Backup & Restore Plugin is affected by filesystem traversal. Exploitation requires at least administrator-level access. A crafted path can escape the intended directory and reach files or directories elsewhere on the server. The published affected range is <= 5.6.6.

CVE / CNA score 7.2 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
BackWPup – WordPress Backup & Restore Plugin
Plugin slug
backwpup
Affected
<= 5.6.6
Safe version
> 5.6.6
Published
Apr 14, 2026
Weakness
CWE-22 — Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

This CVE was published Apr 14, 2026 and is one of 11 known issues for this plugin.

What to do

Update, patch or deactivate.

Update BackWPup – WordPress Backup & Restore Plugin to a release after 5.6.6, 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.

Source record

Technical description

The BackWPup plugin for WordPress is vulnerable to Local File Inclusion via the `block_name` parameter of the `/wp-json/backwpup/v1/getblock` REST endpoint in all versions up to, and including, 5.6.6 due to a non-recursive `str_replace()` sanitization of path traversal sequences. This makes it possible for authenticated attackers, with Administrator-level access and above, to include arbitrary PHP files on the server via crafted traversal sequences (e.g., `....//`), which can be leveraged to read sensitive files such as `wp-config.php` or achieve remote code execution in certain configurations. Administrators have the ability to grant individual users permission to handle backups, which may then allow lower-level users to exploit this vulnerability.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

Primary and upstream sources