Description

Missing Authorization vulnerability in Drupal Data field allows Forceful Browsing. This issue affects Data field versions: from 0.0.0 to 2.0.13.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-09-02T13:18:12.917Z",
  "pubdate": "2026-09-02T13:18:12.917Z",
  "executiveSummary": "The Drupal Data field module is susceptible to a missing authorization vulnerability, which facilitates forceful browsing. This flaw allows unauthorized users to access data or interface elements that should be restricted based on permissions. The vulnerability exists within the Data field module versions ranging from 0.0.0 to 2.0.13. The primary risk involves the exposure of sensitive information or administrative functionalities that are improperly protected by access control checks. An attacker can exploit this by directly crafting requests to specific URLs or resources, bypassing intended security constraints. This unauthorized access can lead to information disclosure or unauthorized manipulation of data stored within the field, depending on the specific configuration. No specialized authentication or high-level privileges are necessarily required for an attacker to reach the vulnerable endpoints, making this a significant security risk for Drupal installations utilizing the Data field module. Organizations should treat this as a high-priority concern due to the ease of exploitation through simple enumeration or path guessing.",
  "technicalDetails": "The root cause of this vulnerability lies in the improper implementation of access control checks within the Data field module. Specifically, the module fails to validate the current user's session or permissions before serving content or executing logic associated with the Data field. This is a classic case of missing authorization, where the application code assumes that the request is legitimate based on the existence of the request path rather than verifying the requesting user's authorization status.\nForceful browsing is the primary exploitation vector. An attacker identifies the URL patterns or resource paths managed by the Data field module. Since the module lacks adequate authorization checks, the attacker can navigate directly to these paths without needing to interact with the legitimate user interface or satisfy the expected role-based access control (RBAC) criteria. By iterating through predictable URL segments or identifiers, the attacker can force the application to reveal data or execute actions that are intended to be hidden from unauthenticated or unauthorized users.\nThe attack flow follows these steps: 1) Identification: The attacker performs discovery to identify the specific URL structure of the Data field module on a target Drupal site. 2) Request Crafting: The attacker constructs a direct HTTP request to a target resource path handled by the vulnerable component. 3) Bypass: Because the component does not verify access rights, the Drupal backend processes the request as a valid action. 4) Data Extraction or Execution: The system serves the protected data or executes the backend function requested by the attacker, effectively granting access where none should exist.\nThis vulnerability is present in Data field versions from 0.0.0 up to 2.0.13. The lack of authorization logic impacts the module's controller or callback functions responsible for retrieving and displaying field data. Because these functions are exposed via the routing system without appropriate access argument definitions or middleware validation, the system implicitly trusts the requester. Post-exploitation impact is severe, as it facilitates unauthorized data exfiltration. If the Data field is linked to sensitive site metadata, configuration, or user-submitted content, this impact is amplified. The exploit does not require complex payloads, as the vulnerability is structural; it relies entirely on the absence of necessary authentication and permission validation routines within the code path."
}