The implementation of Content Security Policy (CSP) violation reports in Mozilla Firefox 4.x through 5, SeaMonkey 2.x before 2.3, and possibly other products does not remove proxy-authorization credentials from the listed request headers, which allows attackers to obtain sensitive information by reading a report, related to incorrect host resolution that occurs with certain redirects.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14458
https://bugzilla.mozilla.org/show_bug.cgi?id=679588
https://bugzilla.mozilla.org/show_bug.cgi?id=664983
http://www.mozilla.org/security/announce/2011/mfsa2011-33.html
http://www.mozilla.org/security/announce/2011/mfsa2011-29.html
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html