CVE-2025-7669 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Avishi WP PayPal Payment Button plugin for WordPress, specifically all versions up to and including 2.0. The root cause of this vulnerability is the absence or improper implementation of nonce validation on the 'avishi-wp-paypal-payment-button/index.php' page. Nonces in WordPress are security tokens used to verify that requests intended to change state originate from legitimate users and not from malicious third parties. Without proper nonce validation, an attacker can craft a malicious request that, if executed by an authenticated site administrator (e.g., by clicking a link or visiting a malicious webpage), can cause unauthorized changes to the plugin’s settings. This could include injecting malicious scripts or altering payment configurations, potentially leading to compromised payment processes or site integrity. The vulnerability requires user interaction (the administrator must be tricked into performing an action) but does not require prior authentication by the attacker. The CVSS v3.1 base score is 6.1 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, but requiring user interaction, with a scope change and low impact on confidentiality and integrity, and no impact on availability. There are no known exploits in the wild at the time of publication, and no official patches have been linked yet. This vulnerability falls under CWE-352, which is a common web application security weakness related to CSRF attacks.

For European organizations using WordPress websites with the Avishi WP PayPal Payment Button plugin, this vulnerability poses a moderate risk. Successful exploitation could allow attackers to manipulate payment button settings, potentially redirecting payments, injecting malicious scripts, or altering transaction parameters. This can lead to financial fraud, loss of customer trust, and reputational damage. Since the attack requires tricking an administrator, organizations with less stringent administrative security awareness or lacking multi-factor authentication may be more vulnerable. E-commerce platforms and NGOs relying on PayPal payments are particularly at risk. Additionally, the scope change in the vulnerability means that an attacker could affect resources beyond the plugin itself, potentially impacting the broader site integrity. While availability is not impacted, the confidentiality and integrity of payment-related data could be compromised, leading to regulatory compliance issues under GDPR if customer data is involved. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits post-disclosure.

European organizations should immediately audit their WordPress installations to identify the presence of the Avishi WP PayPal Payment Button plugin. Until an official patch is released, administrators should implement compensating controls such as: 1) Restricting administrative access to trusted networks and IP addresses to reduce exposure. 2) Enforcing strict administrative session management and multi-factor authentication to prevent unauthorized actions even if an admin is tricked. 3) Educating administrators about phishing and social engineering risks to prevent inadvertent execution of malicious links or requests. 4) Employing Web Application Firewalls (WAFs) with custom rules to detect and block suspicious POST requests to the vulnerable plugin endpoint. 5) Monitoring logs for unusual changes to plugin settings or unexpected POST requests to the affected URL. 6) Temporarily disabling or removing the plugin if feasible until a patch is available. 7) Keeping WordPress core and other plugins updated to reduce overall attack surface. Once a patch is released, organizations should prioritize prompt application of updates and verify nonce validation is correctly implemented.