Package Instance

Improper Input Validation
Drupal core's form API has a vulnerability where certain contributed or custom modules' forms may be vulnerable to improper input validation. This could allow an attacker to inject disallowed values or overwrite data. Affected forms are uncommon, but in certain cases an attacker could alter critical or sensitive data.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
jQuery-UI is the official jQuery user interface library. Prior to version 1.13.0, accepting the value of various `*Text` options of the Datepicker widget from untrusted sources may execute untrusted code. The issue is fixed in jQuery UI 1.13.0. The values passed to various `*Text` options are now always treated as pure text, not HTML. A workaround is to not accept the value of the `*Text` options from untrusted sources.

Drupal Core Remote Code Execution Vulnerability
Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10. This can lead to arbitrary PHP code execution in some cases. A site is only affected by this if one of the following conditions is met: The site has the Drupal 8 core RESTful Web Services (rest) module enabled and allows PATCH or POST requests, or the site has another web services module enabled, like JSON:API in Drupal 8, or Services or RESTful Web Services in Drupal 7. (Note: The Drupal 7 Services module itself does not require an update at this time, but you should apply other contributed updates associated with this advisory if Services is in use.)

Improper access control
In some situations, the Image module does not correctly check access to image files not stored in the standard public files directory when generating derivative images using the image styles system. Access to a non-public file is checked only if it is stored in the "private" file system. However, some contributed modules provide additional file systems, or schemes, which may lead to this vulnerability. This vulnerability is mitigated by the fact that it only applies when the site sets (Drupal 9) $config['image.settings']['allow_insecure_derivatives'] or (Drupal 7) $conf['image_allow_insecure_derivatives'] to TRUE. The recommended and default setting is FALSE, and Drupal core does not provide a way to change that in the admin UI. Some sites may require configuration changes following this security release. Review the release notes for your Drupal version if you have issues accessing files or image styles after updating.

Access bypass in Drupal core
The file download facility does not sufficiently sanitize file paths in certain situations. This may result in users gaining access to private files that they should not have access to. Some sites may require configuration changes following this security release. Review the release notes for your Drupal version if you have issues accessing private files after updating.

URL Redirection to Untrusted Site ('Open Redirect')
External URL injection through URL aliases in drupal.

Cross-site Scripting
Under certain circumstances the File `module/subsystem` allows a malicious user to upload a file that can trigger a cross-site scripting (XSS) vulnerability.

Deserialization of Untrusted Data
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.

Code Injection
Injection in `DefaultMailSystem::mail()`.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
jQuery-UI is the official jQuery user interface library. Prior to version 1.13.0, accepting the value of the `altField` option of the Datepicker widget from untrusted sources may execute untrusted code. The issue is fixed in jQuery UI 1.13.0. Any string value passed to the `altField` option is now treated as a CSS selector. A workaround is to not accept the value of the `altField` option from untrusted sources.

Drupal improper access restrictions
Drupal 7.x before 7.14 does not properly restrict access to nodes in a list when using a "contributed node access module," which allows remote authenticated users with the "Access the content overview page" permission to read all published nodes by accessing the admin/content page.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
jQuery-UI is the official jQuery user interface library.Any string value passed to the `of` option is now treated as a CSS selector. A workaround is to not accept the value of the `of` option from untrusted sources.

Drupal core Unrestricted Upload of File with Dangerous Type
Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.

Moderately critical - Third-party libraries - SA-CORE-2019-007
The `PharStreamWrapper` (aka `phar-stream-wrapper`) package does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a `phar:///path/bad.phar/../good.phar` URL.

Improper Input Validation
A remote code execution vulnerability exists in PHP's built-in phar stream wrapper when performing file operations on an untrusted `phar://` URI. Some Drupal code (core, contrib, and custom) may be performing file operations on insufficiently validated user input, thereby being exposed to this vulnerability. This vulnerability is mitigated by the fact that such code paths typically require access to an administrative permission or an atypical configuration.