The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Family: Web Clients
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.5
Temporal Vector: CVSS2#E:F/RL:OF/RC:C
Metasploit (Firefox location.QueryInterface() Code Execution)