/usr/lib/libreoffice/share/extensions/ is in libreoffice-wiki-publisher 1.2.0+LibO6.0.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libreoffice/share/extensions/wiki-publisher/
/usr/lib/libreoffice/share/extensions/wiki-publisher/Addons.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/Filter.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/META-INF/
/usr/lib/libreoffice/share/extensions/wiki-publisher/META-INF/manifest.xml
/usr/lib/libreoffice/share/extensions/wiki-publisher/OptionsDialog.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/Paths.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/ProtocolHandler.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/Types.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/EditSetting.xdl
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/Module1.xba
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/SendToMediaWiki.xdl
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/Settings.xdl
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/dialog.xlb
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiEditor/script.xlb
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiExtension.xcs
/usr/lib/libreoffice/share/extensions/wiki-publisher/WikiExtension.xcu
/usr/lib/libreoffice/share/extensions/wiki-publisher/components.rdb
/usr/lib/libreoffice/share/extensions/wiki-publisher/description-en-US.txt
/usr/lib/libreoffice/share/extensions/wiki-publisher/description.xml
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/cmarkup.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/entities.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/glayout.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/mmltex.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/scripts.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/tables.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/math/tokens.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/filter/odt2mediawiki.xsl
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US-xhp.done
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US.done
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.db_
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.ht_
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.idxl/
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.idxl/_0.cfs
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.idxl/segments.gen
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.idxl/segments_3
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.jar
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.key_
/usr/lib/libreoffice/share/extensions/wiki-publisher/help/en-US/help.tree
/usr/lib/libreoffice/share/extensions/wiki-publisher/license/
/usr/lib/libreoffice/share/extensions/wiki-publisher/mediawiki.jar
/usr/lib/libreoffice/share/extensions/wiki-publisher/registration/
/usr/lib/libreoffice/share/extensions/wiki-publisher/templates/
/usr/lib/libreoffice/share/extensions/wiki-publisher/templates/MediaWiki/
/usr/lib/libreoffice/share/extensions/wiki-publisher/templates/MediaWiki/mediawiki.ott