EPSS
Percentile
80.3%
Thunderbird, Firefox and Firefox ESR are vulnerable to use-after-free vulnerability. Remote unauthenticated attacker could potentially crash the application when the chrome event handler is freed while still in use.
access.redhat.com/errata/RHSA-2019:1267
access.redhat.com/security/updates/classification/#critical
www.mozilla.org/en-US/security/advisories/mfsa2019-14/