Zope before 2.2.4 does not properly compute local roles, which could allow users to bypass specified access restrictions and gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5777
http://www.redhat.com/support/errata/RHSA-2000-127.html
http://www.linux-mandrake.com/en/updates/2000/MDKSA-2000-083.php3
http://www.debian.org/security/2000/20001219
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000365