CVE-2025-2836 in RegistrationMagic Plugin
Summary
by MITRE • 04/04/2025
The RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘payment_method’ parameter in all versions up to, and including, 6.0.4.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 04/04/2025
The vulnerability identified as CVE-2025-2836 affects the RegistrationMagic plugin for WordPress, specifically targeting versions up to and including 6.0.4.3. This plugin serves as a comprehensive user management solution offering custom registration forms, user registration capabilities, payment processing, and login functionality. The flaw resides in the handling of the 'payment_method' parameter which lacks proper input sanitization and output escaping mechanisms. Attackers with Subscriber-level access or higher can exploit this weakness to inject malicious scripts into the system.
The technical implementation of this stored cross-site scripting vulnerability stems from inadequate validation of user-supplied input within the payment method parameter. When authenticated users submit data through the registration or payment forms, the plugin fails to properly sanitize or escape the input before storing it in the database. This stored data is then subsequently rendered on pages without proper output escaping, creating an environment where malicious scripts can persist and execute whenever other users access affected pages. The vulnerability classification aligns with CWE-79, which describes Cross-Site Scripting flaws that occur when untrusted data is improperly escaped before being returned to users.
The operational impact of this vulnerability extends beyond simple script execution as it creates a persistent threat vector within the WordPress environment. Attackers can leverage this weakness to perform various malicious activities including session hijacking, credential theft, defacement of user accounts, or redirection to malicious websites. Since the vulnerability requires only Subscriber-level access, it represents a significant risk as it can be exploited by users who have legitimate access to the system but may not be authorized to perform such attacks. The stored nature of the XSS means that the injected scripts will execute automatically whenever affected pages are loaded, potentially affecting multiple users over extended periods.
The attack surface for this vulnerability encompasses all pages where payment method data is processed or displayed, including user registration forms, payment processing pages, and user account management interfaces. The ATT&CK framework categorizes this as a privilege escalation vector through persistent XSS techniques, where attackers can maintain access and execute malicious code against other users. Organizations using this plugin should implement immediate mitigations including upgrading to patched versions, implementing input validation at multiple layers, and conducting thorough security reviews of all user-supplied data handling within the WordPress environment. Additionally, network monitoring should be enhanced to detect potential exploitation attempts through unusual data submissions or access patterns.