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DRUPAL-CORE-2020-012

Quick fix

DRUPAL-CORE-2020-012 — drupal/core: upgrade to the fixed version with the command below.

composer require drupal/core:^8.8.11

Details

*Update November 18: Documented longer list of dangerous file extensions*

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/drupal/core

Introduced in: 8.0.0Fixed in: 8.8.11

Fixcomposer require drupal/core:^8.8.11

References

https://www.drupal.org/sa-core-2020-012[WEB]