Description

The HIPAA FORMS WordPress plugin before 3.2.0 contains a hardcoded authentication bypass via a hardcoded parameter alongside all AJAX requests. The server explicitly checks for this value to skip nonce validation entirely. This allows unauthenticated attackers to access protected AJAX endpoints.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-09-02T15:17:38.130Z",
  "pubdate": "2026-09-02T15:17:38.130Z",
  "executiveSummary": "The HIPAA FORMS WordPress plugin, in versions prior to 3.2.0, is affected by a critical authentication bypass vulnerability. The flaw stems from the implementation of a hardcoded parameter within AJAX request handling, which effectively disables nonce validation mechanisms.\nThis vulnerability allows unauthenticated remote attackers to interact with protected AJAX endpoints, bypassing standard WordPress security controls intended to prevent unauthorized execution. By supplying the specific hardcoded parameter, an attacker can perform sensitive operations or access restricted functions without valid session or nonce credentials.\nThe impact includes full unauthorized access to plugin functionality exposed via the AJAX interface. Given the nature of the plugin, this may expose sensitive data or facilitate further exploitation of the WordPress environment. The risk is considered high due to the lack of required authentication or elevated privileges for exploitation, as the attack is achievable via simple network requests.",
  "technicalDetails": "The vulnerability resides in the core AJAX handling logic of the HIPAA FORMS WordPress plugin. The root cause is the implementation of a static, hardcoded authentication bypass mechanism designed to conditionally disable security checks. Specifically, the plugin logic checks for the presence of a predefined parameter within the request object before proceeding to nonce verification.\nWhen this hardcoded parameter is detected during an AJAX request, the backend explicitly skips the execution of the standard wp_verify_nonce() function. By neglecting to validate the security nonce, the plugin effectively removes the cross-site request forgery (CSRF) protection and authentication verification for any AJAX hook registered by the plugin.\nThe attack flow follows a predictable pattern: 1) The attacker identifies the AJAX endpoint managed by the plugin. 2) The attacker crafts an HTTP request (typically a POST request) containing the required hardcoded parameter alongside the intended malicious payload or function call. 3) The server-side code parses the incoming parameters, identifies the hardcoded secret, and subsequently halts the authentication validation workflow. 4) The server processes the requested action as if it were initiated by a legitimate, authenticated user.\nThis vulnerability is present in all versions prior to 3.2.0. The exploit requires no specific user privileges and can be triggered by any unauthenticated remote attacker who can reach the web server. The attack is entirely network-based and does not require complex prerequisites other than knowledge of the hardcoded parameter string. Post-exploitation impact is limited to the functionalities exposed by the plugin's AJAX endpoints; however, since these endpoints are often used for data management, configuration, or file handling, the potential for unauthorized data access, modification, or lateral movement within the WordPress environment is significant.\nThe flaw essentially converts a secure, protected interface into an open gateway, as the developers prioritized a static bypass mechanism over robust session-based validation for these specific endpoints."
}