listing.php in WebSVN 2.0 and possibly 1.7 beta, when using an SVN authz file, allows remote authenticated users to read changelogs or diffs for restricted projects via a modified repname parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/48171
http://www.openwall.com/lists/oss-security/2009/01/18/2
http://www.gentoo.org/security/en/glsa/glsa-200903-20.xml
http://www.debian.org/security/2009/dsa-1725
http://secunia.com/advisories/34191
http://secunia.com/advisories/33945