CVE-2026-6227 Details
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.
A local file inclusion vulnerability has been identified in the BackWPup plugin for WordPress, affecting all versions through 5.6.6. The issue arises in the '/wp-json/backwpup/v1/getblock' REST endpoint, where the 'block_name' parameter is improperly sanitized. This flaw allows authenticated attackers with Administrator-level access to include arbitrary PHP files from the server by exploiting path traversal sequences. Such exploitation could lead to reading sensitive files like 'wp-config.php' or, in certain configurations, allow remote code execution. Additionally, the vulnerability could be exploited by lower-level users if granted backup management permissions by an administrator.
Users are advised to update the BackWPup plugin to version 5.6.7 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 14, 2026CISA-ADP
Assessed Apr 14, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| BackWPup | <= 5.6.6 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 14, 2026 | New CVE Received | [email protected] |