Subversion 1.4.3 and earlier does not properly implement the "partial access" privilege for users who have access to changed paths but not copied paths, which allows remote authenticated users to obtain sensitive information (revision properties) via svn (1) propget, (2) proplist, or (3) propedit.
http://secunia.com/advisories/43139
http://securitytracker.com/id?1018237
https://issues.rpath.com/browse/RPL-1896
http://www.ubuntu.com/usn/USN-1053-1