CVE-2025-27003 in Quick Paypal Payments Plugin
Summary
by MITRE • 09/05/2025
Cross-Site Request Forgery (CSRF) vulnerability in fullworks Quick Paypal Payments allows Cross Site Request Forgery. This issue affects Quick Paypal Payments: from n/a through 5.7.46.
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Analysis
by VulDB Data Team • 09/05/2025
This cross-site request forgery vulnerability in fullworks Quick Paypal Payments represents a critical security flaw that enables attackers to perform unauthorized actions on behalf of authenticated users. The vulnerability exists within the payment processing module of the plugin, where proper CSRF protection mechanisms are either absent or inadequately implemented. Attackers can exploit this weakness by crafting malicious web pages or emails that, when visited by a logged-in user, automatically submit payment requests to the vulnerable system without the user's knowledge or consent.
The technical implementation of this CSRF flaw stems from the absence of anti-CSRF tokens or similar protective measures in the plugin's payment handling endpoints. When users navigate to the payment processing pages, the system fails to validate that requests originate from legitimate sources within the same session. This allows malicious actors to leverage the user's authenticated session to execute transactions, potentially resulting in unauthorized payments, account takeovers, or financial loss. The vulnerability affects all versions from the initial release through 5.7.46, indicating a long-standing issue that has persisted across multiple iterations of the plugin.
The operational impact of this vulnerability extends beyond simple financial loss, as it can lead to complete compromise of user accounts and potentially affect the broader WordPress ecosystem. An attacker who successfully exploits this CSRF vulnerability can initiate unauthorized transactions, modify payment settings, or even redirect payments to malicious accounts. The attack surface is particularly concerning given that PayPal payments typically involve sensitive financial data and user credentials. This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery, and represents a clear violation of secure coding practices that should be implemented at the application level.
Mitigation strategies for this CSRF vulnerability should focus on implementing robust anti-CSRF token mechanisms throughout the payment processing workflow. The plugin developers must ensure that every state-changing request includes a unique, unpredictable token that is validated server-side before processing. Additionally, implementing proper origin validation, using SameSite cookies, and ensuring that all payment-related endpoints require explicit user interaction can significantly reduce the attack surface. Organizations using this plugin should immediately update to the latest available version once a patch is released, while also monitoring for suspicious payment activities. From an ATT&CK framework perspective, this vulnerability maps to T1566.001 (Phishing: Spearphishing Attachment) and T1071.004 (Application Layer Protocol: DNS) as attackers may use these techniques to deliver malicious payloads that exploit the CSRF weakness, potentially leading to broader system compromise through credential theft or financial fraud.
The persistence of this vulnerability across multiple versions highlights the importance of regular security audits and proactive vulnerability management. Organizations should implement automated scanning tools to identify such weaknesses in their WordPress installations and establish security protocols that include regular plugin updates, security hardening measures, and user education about potential phishing threats. The vulnerability also underscores the need for security-conscious development practices, including adherence to OWASP Top Ten security guidelines and regular penetration testing to identify and remediate similar weaknesses before they can be exploited by malicious actors.