The Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.12.7. This is due to missing or incorrect nonce validation on the pmpro_update_level_order() function. This makes it possible for unauthenticated attackers to update the order of levels via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions plugin for WordPress is vulnerable to unauthorized modification of membership levels created by the plugin due to an incorrectly implemented capability check in the pmpro_rest_api_get_permissions_check function in all versions up to 2.12.5 (inclusive). This makes it possible for unauthenticated attackers to change membership levels including prices.

The Paid Memberships Pro plugin for WordPress is vulnerable to arbitrary file uploads to insufficient file type validation in the 'pmpro_paypalexpress_session_vars_for_user_fields' function in versions up to, and including, 2.12.3. This makes it possible for authenticated attackers with subscriber privileges or above, to upload arbitrary files on the affected site's server which may make remote code execution possible. This can be exploited if 2Checkout (deprecated since version 2.6) or PayPal Express is set as the payment method and a custom user field is added that is only visible at profile, and not visible at checkout according to its settings.

The Paid Memberships Pro WordPress plugin before 2.9.12 does not prevent subscribers from rendering shortcodes that concatenate attributes directly into an SQL query.

The Paid Memberships Pro WordPress plugin before 2.9.9 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.

The Paid Memberships Pro WordPress Plugin, version < 2.9.8, is affected by an unauthenticated SQL injection vulnerability in the 'code' parameter of the '/pmpro/v1/order' REST route.

The Paid Memberships Pro WordPress plugin before 2.6.7 does not escape the discount_code in one of its REST route (available to unauthenticated users) before using it in a SQL statement, leading to a SQL injection

The Paid Memberships Pro WordPress plugin before 2.6.6 does not escape the s parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting