Description

Unauthenticated Broken Access Control in JetFormBuilder <= 3.6.4.1 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.5",
  "pubDate": "2026-08-06T15:16:52.707Z",
  "pubdate": "2026-08-06T15:16:52.707Z",
  "executiveSummary": "An unauthenticated broken access control vulnerability has been identified in JetFormBuilder versions 3.6.4.1 and prior. This security flaw introduces significant risk by allowing remote, unauthenticated threat actors to interact with restricted functionality or data handlers without proper authorization checks.\nThe vulnerability stems from insufficient access control enforcement within the affected product's request handling mechanisms. Attackers possessing network connectivity can leverage this architectural oversight to bypass authentication barriers completely, requiring no prior privileges or user interaction.\nSuccessful exploitation of this vulnerability can lead to unauthorized execution of sensitive operations, potential data exposure, or manipulation of backend logic depending on the specific unprotected endpoints exposed by JetFormBuilder. Given the unauthenticated nature of the flaw, organizations utilizing vulnerable installations face a high risk of automated exploitation and systemic compromise until appropriate remediation measures are applied.",
  "technicalDetails": "The vulnerability resides in the access control validation logic of JetFormBuilder versions <= 3.6.4.1. Specifically, the application fails to adequately verify whether incoming HTTP requests originating from unauthenticated users possess the necessary permissions to invoke specific backend functions or access restricted endpoints.\nFrom a root cause perspective, the absence of robust authorization checks or session validation wrappers on sensitive controller actions allows arbitrary callers to bypass intended security boundaries. When an unauthenticated HTTP request targets the vulnerable component, the application processes the payload without confirming the caller's identity or privilege level.\nThe attack flow proceeds as follows: First, the remote attacker identifies the exposed and improperly secured endpoints or request handlers within JetFormBuilder over the network protocol. Second, the attacker crafts a specialized HTTP request designed to trigger the target function. Third, because the underlying code lacks proper access control checks, the application executes the requested operation directly, returning the resulting data or performing the unauthorized state change.\nThe attack surface is exposed over the standard web application network interface, requiring no specialized user interaction, prior access, or administrative privileges. The payload behavior depends on the specific functionality exposed by the vulnerable endpoint, potentially facilitating unauthorized data retrieval, form manipulation, or workflow execution.\nPost-exploitation impact ranges from unauthorized data disclosure to potential system tampering, heavily dependent upon the functional scope of the unprotected endpoints within the JetFormBuilder plugin architecture."
}