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CVE-2017-6921

5.9 · MEDIUM

In Drupal 8 prior to 8.3.4; The file REST resource does not properly validate some fields when manipulating files.

Published Jan 15, 2019CWE-20EPSS 1.83%

Overview

CVE-2017-6921 is a medium-severity vulnerability. It was published on January 15, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/99222Refwww.securitytracker.com/id/1038781Refwww.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multipleRefwww.securityfocus.com/bid/99222Refwww.securitytracker.com/id/1038781Refwww.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple

How CyberStrike helps

Frequently asked questions

What is CVE-2017-6921?

CVE-2017-6921 is a medium-severity vulnerability. It was published on January 15, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2017-6921?

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-6921?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-6921?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-6921 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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