/usr/share/perl5/CGI/ is in libcgi-application-plugin-authentication-perl 0.20-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/CGI/Application/
/usr/share/perl5/CGI/Application/Plugin/
/usr/share/perl5/CGI/Application/Plugin/Authentication/
/usr/share/perl5/CGI/Application/Plugin/Authentication.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Display/
/usr/share/perl5/CGI/Application/Plugin/Authentication/Display.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Display/Basic.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Display/Classic.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Authen/
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Authen/Simple.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/CDBI.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/DBI.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/DBIC.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Dummy.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/crypt.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/lc.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/md5.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/sha1.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/strip.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Filter/uc.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/Generic.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Driver/HTPasswd.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Store/
/usr/share/perl5/CGI/Application/Plugin/Authentication/Store.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Store/Cookie.pm
/usr/share/perl5/CGI/Application/Plugin/Authentication/Store/Session.pm