The recent vulnerability identified in the CP Contact Form with PayPal plugin can significantly impact server security. This flaw, tracked as CVE-2025-13384, allows unauthorized parties to confirm payments without proper authentication.
This vulnerability affects all versions of the CP Contact Form with PayPal plugin up to and including 1.3.56. The plugin exposes an unauthenticated endpoint that processes payment confirmations devoid of any authentications, such as nonce verification. Attackers can exploit this by sending fake payment notifications, allowing them to mark submissions as completed without legitimate payments.
For system administrators and hosting providers, this vulnerability is critical. Without immediate action, servers running this plugin could be compromised, leading not only to financial loss but also to reputational harm. Malicious actors could utilize this gap for phishing attacks or gain unauthorized access to sensitive information.
To safeguard your servers from this vulnerability, consider the following steps:
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