CVE-2025-13985 identifies an Incorrect Authorization vulnerability classified under CWE-863 in the Drupal Entity Share module, affecting all versions prior to 3.13.0. The vulnerability enables forceful browsing, a technique where an attacker bypasses authorization checks to access restricted entities or resources within the Drupal environment. This occurs due to insufficient validation of user permissions when accessing shared entities, allowing unauthorized users to view or manipulate content they should not access. The flaw is rooted in the module's failure to enforce proper access control mechanisms, which is critical in collaborative content management scenarios where entities are shared across different user roles or groups. Although no public exploits have been reported, the vulnerability's nature suggests that attackers could leverage it to escalate privileges or exfiltrate sensitive information. The absence of a CVSS score indicates that the vulnerability is newly disclosed and pending formal severity assessment. However, the impact on confidentiality and integrity is significant, especially in environments where Entity Share is used to manage sensitive or proprietary data. The vulnerability does not require user interaction but may require some level of authentication depending on the Drupal site's configuration. The patch for this vulnerability is expected in version 3.13.0 of the Entity Share module, and organizations should monitor for its release and apply updates promptly. In the interim, reviewing and tightening access control policies and monitoring for unusual access patterns are recommended defensive measures.

For European organizations, the impact of CVE-2025-13985 could be substantial, particularly for those relying on Drupal for content management and collaboration. Unauthorized access to shared entities can lead to data breaches, exposure of confidential information, and potential manipulation of content integrity. This can affect sectors such as government, healthcare, finance, and education, where Drupal is commonly used and where data sensitivity is high. The vulnerability could also facilitate lateral movement within networks if attackers gain access to privileged content or administrative functions. Given the collaborative nature of the Entity Share module, the risk extends to multi-tenant environments and organizations with complex user role hierarchies. The lack of known exploits currently reduces immediate risk but does not diminish the urgency for remediation. Failure to address this vulnerability could result in compliance violations under GDPR and other data protection regulations, leading to legal and financial repercussions.

1. Monitor for the release of Drupal Entity Share module version 3.13.0 or later and apply the update immediately upon availability to remediate the vulnerability. 2. In the interim, conduct a thorough audit of access control configurations related to the Entity Share module, ensuring that permissions are strictly enforced and limited to necessary users only. 3. Implement logging and monitoring to detect unusual access patterns or forceful browsing attempts targeting shared entities. 4. Restrict access to the Drupal administrative interface and sensitive content areas using network segmentation and IP whitelisting where feasible. 5. Educate site administrators and developers about the risks of improper authorization and encourage adherence to the principle of least privilege in role assignments. 6. Consider deploying web application firewalls (WAFs) with custom rules to detect and block forceful browsing attempts until the patch is applied. 7. Review and update incident response plans to include scenarios involving unauthorized access via Drupal modules.