One of the changelog entries for the latest version of Breeze is “Fix: Validation of nonce.” That sounds a bit odd since a nonce is used to prevent cross-site request forgery (CSRF) and to do that to you check that a nonce sent with a request is valid. One of the recent Subversion commits for the plugin looked related as the log message was “Improved security for ‘nonce’ check“. Looking at that explained things, as previously the code only actually checked if a nonce was sent with the request, but not if it was valid, which defeats the purpose of it.

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