Is Export and Import Users and Customers safe? Known vulnerabilities and latest version

The Export and Import Users and Customers plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.7.5 via the plugin's own export and re-import workflow. The vulnerability exists because of a CSV escape-character mismatch between the exporter and the importer: class-csvwriter.php writes cells with fputcsv() using PHP's default backslash (\) escape character, while class-csvreader.php parses the same file with fgetcsv() using a double-quote (") as the escape character. As a result, a crafted value stored in a Subscriber's Biographical Info field — containing a backslash-quote sequence followed by a newline — is written as a single quoted CSV field but parsed back as two separate rows on import. The injected second row is then processed by hf_create_customer() as a new user record whose user_login, user_pass, user_email, and role are entirely attacker-controlled, allowing the creation of an arbitrary Administrator account. This makes it possible for authenticated attackers with Subscriber-level access and above to escalate their privileges to Administrator.

The Export and Import Users and Customers plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.6.2 via deserialization of untrusted input from the 'form_data' parameter. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

The Export and Import Users and Customers plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the admin_log_page() function in all versions up to, and including, 2.6.2. This makes it possible for authenticated attackers, with Administrator-level access and above, to delete arbitrary log files on the server.

The Export and Import Users and Customers plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 2.6.2 via the download_file() function. This makes it possible for authenticated attackers, with Administrator-level access and above, to read the contents of arbitrary log files on the server, which can contain sensitive information.

The Export and Import Users and Customers plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.6.2 via the validate_file() function. This makes it possible for authenticated attackers, with Administrator-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Deserialization of Untrusted Data vulnerability in WebToffee Import Export WordPress Users.This issue affects Import Export WordPress Users: from n/a through 2.5.3.

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in WebToffee Import Export WordPress Users.This issue affects Import Export WordPress Users: from n/a through 2.5.2.

The Export and Import Users and Customers plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation on the 'upload_import_file' function in versions up to, and including, 2.4.8. This makes it possible for authenticated attackers with shop manager-level capabilities or above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

The Export and Import Users and Customers plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'hf_update_customer' function called via an AJAX action in versions up to, and including, 2.4.1. This makes it possible for authenticated attackers, with shop manager-level permissions to change user passwords and potentially take over administrator accounts.