This security advisory fixes multiple vulnerabilities in both Drupal 7 and Drupal 8. See below for a list.
Comment reply form allows access to restricted content - Critical - Drupal 8 - CVE-2017-6926
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.
JavaScript cross-site scripting prevention is incomplete - Critical - Drupal 7 and Drupal 8 - CVE-2017-6927
Drupal has a Drupal.checkPlain() JavaScript function which is used to escape potentially dangerous text before outputting it to HTML (as JavaScript output is not auto-escaped by either Drupal 7 or Drupal 8). This function does not correctly handle all methods of injecting malicious HTML, leading to a cross-site scripting vulnerability under certain circumstances.
The PHP functions which Drupal provides for HTML escaping are not affected.
Private file access bypass - Moderately Critical - Drupal 7 - CVE-2017-6928
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.
jQuery vulnerability with untrusted domains - Moderately Critical - Drupal 7 - CVE-2017-6929
A jQuery cross site scripting vulnerability is present when making Ajax requests to untrusted domains (the CVE for this issue in jQuery is CVE-2015-9251). This vulnerability is mitigated by the fact that it requires contributed or custom modules in order to exploit.
For Drupal 8, this vulnerability was already fixed in Drupal 8.4.0 in the Drupal core upgrade to jQuery 3. For Drupal 7, it is fixed in the current release (Drupal 7.57) for jQuery 1.4.4 (the version that ships with Drupal 7 core) as well as for other newer versions of jQuery that might be used on the site, for example using the
JavaScript cross-site scripting prevention is incomplete - Critical - Drupal 7 and Drupal 8)
jQuery vulnerability with untrusted domains - Moderately Critical - Drupal 7
Settings Tray access bypass - Moderately Critical - Drupal 8
- of the Drupal Security Team
Comment reply form allows access to restricted content - Critical - Drupal 8
- of the Drupal Security Team
of the Drupal Security Team
- of the Drupal Security Team
JavaScript cross-site scripting prevention is incomplete - Critical - Drupal 7 and Drupal 8)
of the Drupal Security Team
of the Drupal Security Team
- of the Drupal Security Team
of the Drupal Security Team
jQuery vulnerability with untrusted domains - Moderately Critical - Drupal 7
- of the Drupal Security Team
of the Drupal Security Team
Settings Tray access bypass - Moderately Critical - Drupal 8
- of the Drupal Security Team
- of the Drupal Security Team
of the Drupal Security Team- Samuel Mortenson
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