12 Jun

Cross-Site Request Forgery (CSRF)/Cross-Site Scripting (XSS) Vulnerability in PayPal Buy Now Button

Recently we found that the plugin Contact Form 7 – PayPal Add-on contained a cross-site request forgery (CSRF) vulnerability with the saving of the plugin’s settings that would allow changing the PayPal address that payments through plugin go to. In looking over the developer’s other plugins we found that the PayPal Buy Now Button plugin contains the same vulnerability with the additional issue that malicious JavaScript can saved to the setting’s, leading to cross-site scripting (XSS).

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