/usr/share/cpl-plugins/ is in cpl-plugin-fors 4.11.12+dfsg-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/cpl-plugins/fors-4.11.12/
/usr/share/cpl-plugins/fors-4.11.12/config/
/usr/share/cpl-plugins/fors-4.11.12/config/fors.conv
/usr/share/cpl-plugins/fors-4.11.12/config/fors.nnw
/usr/share/cpl-plugins/fors-4.11.12/config/fors.param
/usr/share/cpl-plugins/fors-4.11.12/config/fors.sex
/usr/share/cpl-plugins/fors-4.11.12/dic/
/usr/share/cpl-plugins/fors-4.11.12/dic/ESO-DFS-DIC.FORS1_QC
/usr/share/cpl-plugins/fors-4.11.12/dic/ESO-DFS-DIC.FORS2_QC
/usr/share/cpl-plugins/fors-4.11.12/gasgano/
/usr/share/cpl-plugins/fors-4.11.12/gasgano/config/
/usr/share/cpl-plugins/fors-4.11.12/gasgano/config/FORS1.prefs
/usr/share/cpl-plugins/fors-4.11.12/gasgano/config/FORS2.prefs
/usr/share/cpl-plugins/fors-4.11.12/gasgano/config/fors1.oca
/usr/share/cpl-plugins/fors-4.11.12/gasgano/config/fors2.oca
/usr/share/cpl-plugins/fors-4.11.12/reflex/
/usr/share/cpl-plugins/fors-4.11.12/reflex/ForsSpec.xml
/usr/share/cpl-plugins/fors-4.11.12/reflex/fors_calib_interact.py
/usr/share/cpl-plugins/fors-4.11.12/reflex/fors_plot_common.py
/usr/share/cpl-plugins/fors-4.11.12/reflex/fors_science_interact.py
/usr/share/cpl-plugins/fors-4.11.12/reflex/fors_spec_wkf.oca