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cms-core/Documentation/Changelog/9.0/Breaking-82377-OptionToAllowUploadingSystemExtensionsRemoved.rst

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.. include:: /Includes.rst.txt
.. _breaking-82377:
======================================================================
Breaking: #82377 - Option to allow uploading system extensions removed
======================================================================
See :issue:`82377`
Description
===========
The option to allow uploading additional extensions as system extensions in TYPO3 has been removed
without substitution.
Disclaimer: It is highly discouraged by the TYPO3 Core to modify anything within `typo3/sysext/`,
especially adding extensions, as typo3conf/ is the folder to add or override extensions.
If an administrator needs to do changes within `typo3/sysext/` it's at his/her own risk,
and should not be encouraged to be possible from TYPO3 itself.
Impact
======
The possibility to upload an extension into `typo3/sysext/` via the Extension Manager / TYPO3 Backend
interface is removed. System extensions can only be added or modified via the file system now.
Affected Installations
======================
TYPO3 instances having the option `$GLOBALS['TYPO3_CONF_VARS']['EXT']['allowSystemInstall']` enabled and do not
run in TYPO3's Composer Mode.
As this option was disabled by default for over 10 years, it is highly unlikely this change will
affect a regular instance.
Migration
=========
The mentioned option, if set, is automatically removed when accessing the Install Tool through
the :php:`SilentMigrationService`.
.. index:: LocalConfiguration, FullyScanned