/usr/share/mediawiki-extensions/ is in mediawiki-extensions-openid 2.5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/mediawiki-extensions/openid/
/usr/share/mediawiki-extensions/openid/OpenID.alias.php
/usr/share/mediawiki-extensions/openid/OpenID.hooks.php
/usr/share/mediawiki-extensions/openid/OpenID.i18n.php
/usr/share/mediawiki-extensions/openid/OpenID.php
/usr/share/mediawiki-extensions/openid/OpenID.setup.php
/usr/share/mediawiki-extensions/openid/SpecialOpenID.body.php
/usr/share/mediawiki-extensions/openid/SpecialOpenIDConvert.body.php
/usr/share/mediawiki-extensions/openid/SpecialOpenIDFinish.body.php
/usr/share/mediawiki-extensions/openid/SpecialOpenIDLogin.body.php
/usr/share/mediawiki-extensions/openid/SpecialOpenIDServer.body.php
/usr/share/mediawiki-extensions/openid/SpecialOpenIDXRDS.body.php
/usr/share/mediawiki-extensions/openid/openid_table.pg.sql
/usr/share/mediawiki-extensions/openid/openid_table.sql