CVE-2017-5435: Mozilla: Use-after-free during transaction processing in the editor (MFSA 2017-11, MFSA 2017-12)

Severity: Critical

CVSS Score: 9.8

A use-after-free vulnerability occurs during transaction processing in the editor during design mode interactions. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.