CVE-2026-107258 in Inline Entity Form Dialog Plugin
Summary
by MITRE • 10/30/2026
Incorrect Authorization vulnerability in Drupal Inline Entity Form Dialog allows Forceful Browsing. This issue affects Inline Entity Form Dialog versions: from 0.0.0 to 1.0.6.
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Analysis
by VulDB Data Team • 10/30/2026
The identified security flaw resides within the Inline Entity Form Dialog module for Drupal, specifically affecting version ranges from 0.0.0 through 1.0.6. This vulnerability is classified as an incorrect authorization issue that facilitates forceful browsing, a technique where attackers access resources without proper authentication or authorization checks. The core technical deficiency lies in the failure of the application to adequately verify user permissions before rendering sensitive form data or allowing interactions with entity forms within the dialog interface. In typical Drupal architectures, inline entity forms are used to embed complex input fields directly into other content types, often requiring specific role-based access controls. However, due to this implementation error, the module does not strictly enforce these access boundaries when processing requests related to the dialog component. Consequently, any authenticated user with even minimal privileges may be able to view or manipulate data intended for administrators or users with higher privilege levels, bypassing the expected security model of the content management system.
From a technical perspective, this vulnerability aligns closely with CWE-284, which describes Improper Access Control, and more specifically relates to CWE-639 regarding Authorization Bypass through User-supplied Input if the attack vector involves manipulating request parameters to bypass checks. The operational impact is significant because it undermines the principle of least privilege within the Drupal environment. Attackers can exploit this flaw to extract sensitive information stored in entities that are not supposed to be visible to their current user role, or potentially modify data they should not have write access to if the dialog allows for submission operations without proper validation. This could lead to unauthorized disclosure of confidential business logic, customer data, or internal configurations depending on what entity types are managed through this module. The ability to force browse these dialogs effectively neutralizes the security controls designed to segment user capabilities, creating a pathway for further exploitation such as cross-site scripting if malicious content can be injected into fields that lack proper sanitization in addition to lacking access control.
This type of vulnerability is also relevant to MITRE ATT&CK techniques involving unauthorized access and data exfiltration, particularly within the context of web application attacks where privilege escalation or lateral movement might follow initial reconnaissance via forceful browsing. The exploitation does not require complex payload construction but rather relies on crafting HTTP requests that target specific endpoints associated with the inline entity form dialog while omitting or altering authorization headers to simulate a lower-privileged user accessing high-level resources. This simplicity makes it an attractive vector for automated scanning tools and opportunistic attackers targeting Drupal installations running affected versions.
To mitigate this risk, immediate action is required by upgrading the Inline Entity Form Dialog module to version 1.0.7 or any later release where these authorization checks have been corrected. Site administrators should verify their current module versions through the Drupal administration interface or via command-line tools like Drush. In addition to updating software, it is advisable to review access logs for unusual patterns of requests targeting entity form dialogs by users with low privilege levels, which may indicate active exploitation attempts. Implementing a Web Application Firewall can provide an additional layer of defense by detecting and blocking anomalous request structures associated with forceful browsing attacks, although this should be viewed as a compensating control rather than a primary fix. Regular security audits and adherence to secure coding standards that emphasize strict authorization verification at every entry point are essential for maintaining the integrity of Drupal-based applications against such access control failures.