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.

In Drupal Core versions 7.x prior to 7.62, 8.6.x prior to 8.6.6 and 8.5.x prior to 8.5.9; Drupal core uses the third-party PEAR Archive_Tar library. This library has released a security update which impacts some Drupal configurations. Refer to CVE-2018-1000888 for details

A remote code execution vulnerability exists within multiple subsystems of Drupal 7.x and 8.x. This potentially allows attackers to exploit multiple attack vectors on a Drupal site, which could result in the site being compromised. This vulnerability is related to Drupal core - Highly critical - Remote Code Execution - SA-CORE-2018-002. Both SA-CORE-2018-002 and this vulnerability are being exploited in the wild.

Drupal before 7.58, 8.x before 8.3.9, 8.4.x before 8.4.6, and 8.5.x before 8.5.1 allows remote attackers to execute arbitrary code because of an issue affecting multiple subsystems with default or common module configurations.

Drupal core 7.x versions before 7.57 has an external link injection vulnerability when the language switcher block is used. A similar vulnerability exists in various custom and contributed modules. This vulnerability could allow an attacker to trick users into unwillingly navigating to an external site.

A jQuery cross site scripting vulnerability is present when making Ajax requests to untrusted domains. 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 jQuery Update module.

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.

Drupal 8.4.x versions before 8.4.5 and Drupal 7.x versions before 7.57 has a Drupal.checkPlain() JavaScript function which is used to escape potentially dangerous text before outputting it to HTML (as JavaScript output does not typically go through Twig autoescaping). 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.

Cross-site scripting (XSS) vulnerability in jquery.ui.dialog.js in the Dialog widget in jQuery UI before 1.10.0 allows remote attackers to inject arbitrary web script or HTML via the title option.

Cross-site request forgery (CSRF) vulnerability in the RESTful Web Services (restws) module 7.x-1.x before 7.x-1.2 and 7.x-2.x before 7.x-2.0-alpha4 for Drupal allows remote attackers to hijack the authentication of arbitrary users via unknown vectors.

Cross-site request forgery (CSRF) vulnerability in the Content Lock module for Drupal allows remote attackers to hijack the authentication of unspecified victims via unknown vectors.

The Contact Forms module 7.x-1.x before 7.x-1.2 for Drupal does not specify sufficiently restrictive permissions, which allows remote authenticated users with the "access the site-wide contact form" permission to modify the module settings via unspecified vectors.

Cross-site scripting (XSS) vulnerability in the Glossary module 6.x-1.x before 6.x-1.8 for Drupal allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to "taxonomy information."

Cross-site scripting (XSS) vulnerability in the aberdeen_breadcrumb function in template.php in the Aberdeen theme 6.x-1.x before 6.x-1.11 for Drupal, when set to append the content title to the breadcrumb, allows remote attackers to inject arbitrary web script or HTML via the content title in a breadcrumb.

Cross-site request forgery (CSRF) vulnerability in the Take Control module 6.x-2.x before 6.x-2.2 for Drupal allows remote attackers to hijack the authentication of unspecified users for Ajax requests that manipulate files.

SQL injection vulnerability in the Views module before 6.x-2.13 for Drupal allows remote attackers to execute arbitrary SQL commands via vectors related to "filters/arguments on certain types of views with specific configurations of arguments."

Multiple cross-site scripting (XSS) vulnerabilities in revisioning_theme.inc in the Taxonomy module in the Revisioning module 6.x-3.13 and other versions before 6.x-3.14 for Drupal allow remote authenticated users with certain privileges to inject arbitrary web script or HTML via the (1) tags or (2) term parameters.

Cross-site request forgery (CSRF) vulnerability in the clickthrough tracking functionality in the Forward module 6.x-1.x before 6.x-1.21 and 7.x-1.x before 7.x-1.3 for Drupal allows remote attackers to hijack the authentication of administrators for requests that increase node rankings via the tracking code, possibly related to improper "flood control."

The Forward module 6.x-1.x before 6.x-1.21 and 7.x-1.x before 7.x-1.3 for Drupal does not properly enforce permissions for (1) Recent forwards, (2) Most forwarded, or (3) Dynamic blocks, which allows remote attackers to obtain node titles via unspecified vectors.

Cross-site scripting (XSS) vulnerability in display_renderers/panels_renderer_editor.class.php in the admin view in the Panels module 6.x-2.x before 6.x-3.10 and 7.x-3.x before 7.x-3.0 for Drupal allows remote authenticated users with certain privileges to inject arbitrary web script or HTML via the Region title.