https://patchstack.com/database/vulnerability/nd-donations/wordpress-donations-plugin-1-8-authenticated-stored-cross-site-scripting-xss-vulnerability

Authenticated (contributor or higher role) Cross-Site Scripting (XSS) vulnerability in Donations plugin <= 1.8 on WordPress.

Donations <= 1.8 - Unauthenticated SQLi

The Donations WordPress plugin through 1.8 does not sanitise and escape the nd_donations_id parameter before using it in a SQL statement via the nd_donations_single_cause_form_validate_fields_php_function AJAX action (available to unauthenticated users), leading to an unauthenticated SQL Injection

The nd-donations plugin before 1.4 for WordPress has a nopriv_ AJAX action that allows modification of the siteurl setting.