The user form processing (userform.py) in MoinMoin before 1.6.3, when using ACLs or a non-empty superusers list, does not properly manage users, which allows remote attackers to gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/41909
http://www.vupen.com/english/advisories/2008/1307/references
http://www.securityfocus.com/bid/28869
http://security.gentoo.org/glsa/glsa-200805-09.xml
http://secunia.com/advisories/30160