CVE-2025-13985 in Entity Share
Summary
by MITRE • 01/28/2026
Incorrect Authorization vulnerability in Drupal Entity Share allows Forceful Browsing.This issue affects Entity Share: from 0.0.0 before 3.13.0.
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Analysis
by VulDB Data Team • 01/29/2026
The CVE-2025-13985 vulnerability represents a critical authorization flaw within the Drupal Entity Share module that exposes systems to forceful browsing attacks. This vulnerability specifically impacts versions prior to 3.13.0 of the Entity Share module, creating a significant security risk for Drupal installations that rely on this component for entity sharing functionality. The flaw allows authenticated users to bypass intended access controls and access entities they should not be permitted to view, fundamentally undermining the security model of the application. The vulnerability stems from insufficient validation of user permissions during entity access requests, enabling malicious actors to exploit the system's authorization mechanisms through crafted requests that circumvent normal access controls.
The technical implementation of this vulnerability resides in the module's handling of entity access checks where proper authorization validation fails to occur before granting access to shared entities. This flaw creates a path for unauthorized information disclosure through forceful browsing techniques where attackers can systematically access resources by manipulating request parameters or directly accessing URLs that should be restricted. The vulnerability operates at the application layer, specifically within the entity sharing functionality, and can be exploited by users who have basic authentication credentials but lack proper authorization for specific entities. This authorization bypass occurs because the system does not adequately verify user permissions against the requested entity before granting access, allowing privilege escalation through indirect means.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attacks including data exfiltration, privilege escalation, and lateral movement within affected systems. Organizations running Drupal installations with vulnerable Entity Share modules face significant risk of unauthorized data access, particularly in environments where sensitive information is shared between users with varying permission levels. The vulnerability can be exploited by both internal users with legitimate accounts and external attackers who have gained initial access to the system, making it particularly dangerous in multi-tenant environments where data isolation is critical. Attackers can leverage this flaw to systematically enumerate and access entities that should remain restricted, potentially exposing confidential information, user data, or system configurations.
Security mitigations for this vulnerability require immediate patching of the Entity Share module to version 3.13.0 or later where the authorization checks have been properly implemented. Organizations should also implement additional monitoring and logging of entity access patterns to detect potential exploitation attempts, as well as review and validate existing access control policies to ensure proper segregation of duties. The fix addresses the root cause by implementing proper authorization validation before entity access is granted, ensuring that user permissions are consistently checked against the requested resources. Organizations should also conduct thorough security assessments of their Drupal installations to identify any other modules that may be vulnerable to similar authorization bypass techniques, following the principle of least privilege and implementing comprehensive access control measures. This vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and represents a clear violation of the principle of least privilege that forms the foundation of secure application design.
The exploitation of this vulnerability demonstrates the critical importance of proper access control implementation in web applications, particularly those handling sensitive data through sharing mechanisms. Security practitioners should recognize this as a systemic issue that highlights the need for comprehensive security testing including authorization validation, access control reviews, and proper input validation. The vulnerability also underscores the importance of keeping third-party modules updated and maintaining visibility into the security posture of all components within Drupal installations. Organizations should implement automated patch management processes to ensure timely deployment of security fixes and establish incident response procedures specifically designed to address authorization bypass vulnerabilities. This particular flaw serves as a reminder that even seemingly simple sharing functionality can introduce complex security risks when proper authorization controls are not adequately implemented.