The navigator.sendBeacon implementation in Mozilla Firefox before
37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6
processes HTTP 30x status codes for redirects after a preflight
request has occurred, which allows remote attackers to bypass intended
CORS access-control checks and conduct cross-site request forgery
(CSRF) attacks via a crafted web site, a similar issue to
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the CVE-ID was allocated or reserved, and does not
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discovered, shared with the affected vendor, publicly
disclosed, or updated in CVE.
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list, which standardizes names for security