A cross-origin restriction bypass flaw was found in Firefox: Security researcher Abdulrahman Alqabandi reported that the fetch() API did not correctly implement the Cross-Origin Resource Sharing (CORS) specification, allowing a malicious page to access private data from other origins. Mozilla developer Ben Kelly independently reported the same issue. This issue was fixed in Firefox 41.0.2. Upstream bugs: https://bugzilla.mozilla.org/show_bug.cgi?id=1208339 https://bugzilla.mozilla.org/show_bug.cgi?id=1212669 External References: https://www.mozilla.org/en-US/security/advisories/mfsa2015-115/
Fixed in Fedora in packages: firefox-41.0.2-2.fc23 firefox-41.0.2-2.fc21 firefox-41.0.2-2.fc24 firefox-41.0.2-2.fc22
Statement: This issue did not affect the versions of firefox as shipped with Red Hat Enterprise Linux 5, 6, and 7.