Directory traversal vulnerability in MoinMoin 1.5.8 and earlier allows remote attackers to overwrite arbitrary files via a .. (dot dot) in the MOIN_ID user ID in a cookie for a userform action. NOTE: this issue can be leveraged for PHP code execution via the quicklinks parameter.
https://www.exploit-db.com/exploits/4957
https://exchange.xforce.ibmcloud.com/vulnerabilities/39837
http://www.vupen.com/english/advisories/2008/0569/references
http://www.securityfocus.com/bid/27404
http://www.gentoo.org/security/en/glsa/glsa-200803-27.xml
http://www.debian.org/security/2008/dsa-1514
http://www.attrition.org/pipermail/vim/2008-January/001890.html
http://secunia.com/advisories/33755
http://secunia.com/advisories/29444
http://secunia.com/advisories/29262