CVE-2026-15255 in RegistrationMagic Plugin
Summary
by MITRE • 07/30/2026
The RegistrationMagic WordPress plugin before 6.0.9.4 does not properly validate that a one-time password presented in a cookie belongs to the identity being requested before returning front-end form submissions, allowing unauthenticated attackers to read other users' form submission data, including personal information.
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Analysis
by VulDB Data Team • 07/30/2026
The vulnerability in RegistrationMagic WordPress plugin affects versions prior to 6.0.9.4 and represents a critical authentication bypass flaw that undermines the security of user data protection mechanisms. This issue stems from inadequate validation of one-time password tokens stored in cookies, creating a scenario where unauthorized individuals can exploit the system's weak session management to access sensitive information from other users' form submissions. The flaw specifically targets the plugin's front-end form processing functionality, where proper identity verification should occur before granting access to submission data.
The technical implementation of this vulnerability occurs at the cookie validation layer where the system fails to establish proper cryptographic linkage between the one-time password token and the user identity requesting access. This allows attackers to manipulate cookie values to impersonate legitimate users or to bypass authentication checks entirely. When a user submits form data through the RegistrationMagic plugin, the system should verify that the one-time password in the cookie corresponds to the intended recipient's identity before serving the submission contents. The absence of this validation creates an access control weakness that can be exploited across different user sessions and accounts.
Operationally, this vulnerability exposes significant risks to user privacy and data integrity as attackers can potentially read personal information from other users' form submissions without proper authentication. The impact extends beyond simple data exposure to include potential identity theft, social engineering attacks, and violation of privacy regulations such as gdpr and ccpa. Attackers could systematically harvest personal data including names, email addresses, phone numbers, and any other information submitted through the vulnerable plugin's forms. This creates a substantial risk for organizations using RegistrationMagic as their user registration and form management solution.
The vulnerability aligns with common weakness enumerations such as cwe-287 which addresses improper authentication mechanisms, and may also relate to cwe-352 covering cross-site request forgery issues in web applications. From an attack framework perspective, this flaw maps to techniques described in the mitre att&ck framework under initial access and credential access phases, particularly targeting credential stuffing and session hijacking methodologies. The attack vector requires minimal privileges and can be executed through simple cookie manipulation or automated tools that exploit the weak validation logic.
Mitigation strategies should include immediate upgrade to RegistrationMagic plugin version 6.0.9.4 or later, which contains the necessary patches for proper one-time password validation. Organizations should also implement additional monitoring of authentication-related activities and cookie handling within their web applications. Network-level security controls such as web application firewalls can help detect and block suspicious cookie manipulation attempts, while application-level logging should track unauthorized access attempts to form submissions. Regular security assessments and penetration testing of WordPress installations using RegistrationMagic are recommended to identify similar vulnerabilities in other plugins or custom implementations that may present similar authentication bypass risks.