MoinMoin before 20070507 does not properly enforce ACLs for calendars and includes, which allows remote attackers to read certain pages via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34474
http://www.ubuntu.com/usn/usn-458-1
http://www.debian.org/security/2008/dsa-1514
http://secunia.com/advisories/29262