Hi to all, I have find a too high numbers of lines in Koha errors logs. All lines have: ... CGI::param called in list context from package main line xxx this can lead to vulnerabilities. See the warning in "Fetching the value or values of a single named parameter" at /usr/share/perl5/CGI.pm line 436. I use Debian Jessie with Koha 3.20.7. CGI.pm version is 4.09, the jessie version: https://packages.debian.org/jessie/libcgi-pm-perl Reading this one: http://www.perlmonks.org/?node_id=1105164 and seeing this bugzilla: https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=14076 I go to /usr/share/perl5/CGI.pm, line 28 and I change $LIST_CONTEXT_WARN = 1; into $LIST_CONTEXT_WARN = 0; Now no more warings in error logs. But I don't know: 1)Is present a better way that change a core lib code ? 2)What do we do about "CGI::param called in list context ... can lead to vulnerabilities" ? Bye Zeno Tajoli