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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.

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Drupal 安全漏洞

Drupal是Drupal社区的一套使用PHP语言开发的开源内容管理系统。 Drupal 7.91之前版本、9.3.19之前版本和9.4.3之前版本存在安全漏洞，该漏洞源于图像模块不会正确检查对未存储在标准公共文件目录中的图像文件。

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