CVE-2017-6928

Severity: medium (CVSS 5.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-01 · updated 2026-06-17
Weakness: CWE-732

Description

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Affected products

Debian Linux: 7.0, 8.0, 9.0
Drupal: from 7.0 before 7.57 — fixed in 7.57

How to fix

Upgrade to a fixed version: Drupal 7.57. Check the vendor advisory for mitigations.

References

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