cmsjunkie WP-BusinessDirectory Plugin up to 4.0.1 on WordPress Path Validation wp-config.php remove _filename file inclusion

Summaryinfo

A vulnerability identified as critical has been detected in cmsjunkie WP-BusinessDirectory Plugin up to 4.0.1 on WordPress. This issue affects the function remove of the file wp-config.php of the component Path Validation Handler. Performing a manipulation of the argument _filename results in file inclusion. This vulnerability is reported as CVE-2026-6070. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in cmsjunkie WP-BusinessDirectory Plugin up to 4.0.1 on WordPress. It has been classified as critical. This affects the function remove of the file wp-config.php of the component Path Validation Handler. The manipulation of the argument _filename with an unknown input leads to a file inclusion vulnerability. CWE is classifying the issue as CWE-73. The product allows user input to control or influence paths or file names that are used in filesystem operations. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The WP-BusinessDirectory plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Deletion in versions up to and including 4.0.1. This is due to insufficient path validation in the remove() method of the JBusinessDirectoryControllerUpload class. The task=upload.remove endpoint is accessible without authentication via the plugin's frontend routing system. The _filename parameter is accepted with RAW filter (no sanitization), and the helper function makePathFile() only normalizes directory separator characters without stripping path traversal sequences (../). When combined with the _path_type=2 parameter, which sets the base directory to the plugin's site folder, an attacker can supply a _filename value containing ../ sequences to traverse outside the plugin directory and call PHP's unlink() on arbitrary files — including wp-config.php, wp-config-backup.php, or other critical server files accessible to the web server process. This makes it possible for unauthenticated attackers to delete arbitrary files on the server.

The weakness was disclosed by Nabil Irawan. It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-6070 since 04/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/01/2026).

By approaching the search of inurl:wp-config.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40908). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• cmsjunkie

Name

• WP-BusinessDirectory Plugin

Version

• 4.0.0
• 4.0.1

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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