CVE-2017-6926 Drupal Comment reply form allows access to restricted content

What is CVE-2017-6926?

CVE-2017-6926 is a high-severity missing authorization vulnerability in Drupal Drupal, published on 1 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Drupal versions 8.4.x versions before 8.4.5 users with permission to post comments are able to view content and comments they do not have access to, and are also able to add comments to this content. This vulnerability is mitigated by the fact that the comment system must be enabled and the attacker must have permission to post comments.

Weakness: CWE-200

Which versions are affected by CVE-2017-6926?

8 open source packages ship an affected version, including drupal/core and drupal/drupal. It affects 1 product.

Products include Drupal Drupal.

How do I fix CVE-2017-6926?

Upgrade drupal/core to a fixed version for your release line: 7.57 or 8.4.5.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2017-6926 being exploited?

There is no known exploitation of CVE-2017-6926 in the wild and no public exploit code.

Other vulnerabilities in Drupal Drupal

• CVE-2026-9082 Drupal Core SQL Injection Exploited Critical 9.8
• CVE-2020-13671 Drupal core Un-restricted Upload of File Exploited High 8.8
• CVE-2019-6340 Drupal Core Remote Code Execution Exploited High 8.1
• CVE-2009-3352 Other in n/a Critical 10.0
• CVE-2024-55636 Drupal core - Less critical - Gadget chain - SA-CORE-2024-006 Critical 9.8

All Drupal Drupal vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2p28-5mvp-2j2r.