CVE-2017-5390: Mozilla: Insecure communication methods in Developer Tools JSON viewer (MFSA 2017-02)

Severity: Critical

CVSS Score: 9.8

The JSON viewer in the Developer Tools uses insecure methods to create a communication channel for copying and viewing JSON or HTTP headers data, allowing for potential privilege escalation. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.