CVE-2015-4520 | Mozilla Firefox up to 40 CORS Preflight Protection 7pk security (RHSA-2015:1834 / Nessus ID 86514)
A vulnerability was found in Mozilla Firefox up to 40. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component CORS Preflight Protection Handler. The manipulation leads to 7pk security features.
This vulnerability is known as CVE-2015-4520. The attack can be launched remotely. There is no exploit available.
It is recommended to upgrade the affected component.