CVE-2017-6921

In Drupal 8 prior to 8.3.4; The file REST resource does not properly validate some fields when manipulating files. A site is only affected by this if the site has the RESTful Web Services (rest) module enabled, the file REST resource is enabled and allows PATCH requests, and an attacker can get or register a user account on the site with permissions to upload files and to modify the file resource.

• CWE-20

• http://www.securityfocus.com/bid/99222Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1038781Third Party Advisory, VDB Entry
• https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multipleMitigation, Vendor Advisory
• http://www.securityfocus.com/bid/99222Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1038781Third Party Advisory, VDB Entry
• https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multipleMitigation, Vendor Advisory

Published

Jan 15, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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