The Donation Button WordPress plugin through 4.0.0 does not properly check for privileges and nonce tokens in its "donation_button_twilio_send_test_sms" AJAX action, which may allow any users with an account on the affected site, like subscribers, to use the plugin's Twilio integration to send SMSes to arbitrary phone numbers.

The Donation Button WordPress plugin through 4.0.0 does not sanitize and escapes some parameters, which could allow users with a role as low as Contributor to perform Cross-Site Scripting attacks.