Files uploaded by anonymous users into a private file system can be accessed by other anonymous users

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.

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Drupal core 访问控制错误漏洞

Drupal是Drupal社区所维护的一套用PHP语言开发的免费、开源的内容管理系统。 Drupal 7.56之前的7.x版本和8.3.4之前的8.x版本中存在安全漏洞。攻击者可利用该漏洞绕过安全限制，执行未授权的操作。

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