/usr/share/cpl-plugins/ is in cpl-plugin-xshoo 2.8.4+dfsg-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/cpl-plugins/xshoo-2.8.4/
/usr/share/cpl-plugins/xshoo-2.8.4/dic/
/usr/share/cpl-plugins/xshoo-2.8.4/dic/ESO-DFS-DIC.XSHOO_QC
/usr/share/cpl-plugins/xshoo-2.8.4/dic/ESO-VLT-DIC.XSHOO_CFG
/usr/share/cpl-plugins/xshoo-2.8.4/dic/ESO-VLT-DIC.XSHOO_DCS
/usr/share/cpl-plugins/xshoo-2.8.4/dic/ESO-VLT-DIC.XSHOO_ICS
/usr/share/cpl-plugins/xshoo-2.8.4/dic/ESO-VLT-DIC.XSHOO_OS
/usr/share/cpl-plugins/xshoo-2.8.4/gasgano/
/usr/share/cpl-plugins/xshoo-2.8.4/gasgano/config/
/usr/share/cpl-plugins/xshoo-2.8.4/gasgano/config/XSHOO.prefs
/usr/share/cpl-plugins/xshoo-2.8.4/gasgano/config/xshoo.oca
/usr/share/cpl-plugins/xshoo-2.8.4/gasgano/config/xshoo.tpl.oca