CVE-2018-5103: Mozilla: Use-after-free during mouse event handling (MFSA 2018-03)

Severity: Critical

CVSS Score: 9.8

A use-after-free vulnerability can occur during mouse event handling due to issues with multiprocess support. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.