The plugin does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.
1. Insert the following shortcode into a page/post: [pmpro_checkout_button class=‘" onmouseover=“alert(1)”’] 2. Browse the page and hover over the button.
CPE | Name | Operator | Version |
---|---|---|---|
paid-memberships-pro | lt | 2.9.9 |