CVE-2017-6926 Explained : Impact and Mitigation

Drupal Core versions before 8.4.5 allow users with comment posting privileges to view unauthorized content and comments, and add comments to such content.

Understanding CVE-2017-6926

This CVE affects Drupal Core versions before 8.4.5, enabling users to access and comment on unauthorized content.

What is CVE-2017-6926?

Users with comment posting rights in Drupal versions prior to 8.4.5 can see and comment on content they are not authorized to access.
The vulnerability is partially mitigated by the need to enable the comment system and the attacker requiring permission to post comments.

The Impact of CVE-2017-6926

Unauthorized access: Users can view and comment on content they should not have access to.
Comment manipulation: Attackers can add comments to unauthorized content.

Technical Details of CVE-2017-6926

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Access Bypass: Users with comment posting privileges can bypass access controls.

Affected Systems and Versions

Product: Drupal Core
Vendor: Drupal.org
Affected Versions: 8.4.x versions before 8.4.5

Exploitation Mechanism

Users exploit their comment posting permissions to view and comment on unauthorized content.

Mitigation and Prevention

Protect your systems from CVE-2017-6926 with these mitigation strategies.

Immediate Steps to Take

Update to Drupal Core version 8.4.5 or later to patch the vulnerability.
Limit user permissions to reduce the risk of unauthorized access.

Long-Term Security Practices

Regularly review and adjust user permissions to prevent unauthorized access.
Monitor and audit comment activities to detect suspicious behavior.

Patching and Updates

Stay informed about security updates from Drupal.org and apply patches promptly to secure your system.