CVE-2017-6922: Files uploaded by anonymous users into a private file system can be accessed by other anonymous users
Files uploaded by anonymous users into a private file system can be accessed by other anonymous users
Other sources
In Drupal core 8.x prior to 8.3.4 and Drupal core 7.x prior to 7.56; Private files that have been uploaded by an anonymous user but not permanently attached to content on the site should only be visible to the anonymous user that uploaded them, rather than all anonymous users. Drupal core did not previously provide this protection, allowing an access bypass vulnerability to occur. This issue is mitigated by the fact that in order to be affected, the site must allow anonymous users to upload files into a private file system.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2017-6922?
The severity of CVE-2017-6922 is classified as moderate since it allows anonymous users to access private files uploaded by other anonymous users.
How do I fix CVE-2017-6922?
To fix CVE-2017-6922, update Drupal to version 7.56 or 8.3.4 or later.
Who is affected by CVE-2017-6922?
CVE-2017-6922 affects Drupal core version 8.x prior to 8.3.4 and 7.x prior to 7.56.
Can CVE-2017-6922 lead to data exposure?
Yes, CVE-2017-6922 can lead to unauthorized data exposure as private files uploaded by anonymous users can be accessed by other anonymous users.
What should I do if I can't upgrade my Drupal version to fix CVE-2017-6922?
If upgrading is not possible, you should restrict anonymous user access to file uploads to mitigate the risk associated with CVE-2017-6922.