Provide references for CVE-2015-4639.
Where can I find more information about CVE-2015-4639?
References are available at: http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=14416#c4, https://koha-community.org/security-release-koha-3-16-12/, https://koha-community.org/security-release-koha-3-20-1/, https://koha-community.org/koha-3-14-16-released/.