LowDRUPAL-CORE-2019-010

DRUPAL-CORE-2019-010 in drupal/core

Published 18 Dec 2019 · Updated 19 Sept 2026

Affected package

drupal/coreComposer
Affected
>=8.0.0 <8.7.11 · >=8.8.0 <8.8.1
Fixed in
8.7.11, 8.8.1
Update to the fixed version for your release line, for example:composer require drupal/core:^8.8.1

Details

Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did.

Users with the ability to upload files with any extension in conjunction with contributed modules may be able to use this to upload system files such as .htaccess in order to bypass protections afforded by Drupal's default .htaccess file.

After this fix, file_save_upload() now trims leading and trailing dots from filenames.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.