appconfig.php in ownCloud before 4.0.6 does not properly restrict access, which allows remote authenticated users to edit app configurations via unspecified vectors. NOTE: this can be leveraged by unauthenticated remote attackers using CVE-2012-4393.
https://github.com/owncloud/core/commit/9605e1926c6081e88326bf78a02c1d1b83126c4f
http://www.openwall.com/lists/oss-security/2012/09/02/2