Information stealing via local shortcut files — Mozilla

Security researcher Liu Die Yu of TopsecTianRongXin reported that locally saved .url shortcut files could be used to read information stored in the local cache. An attacker could use this vulnerability to steal information from a victim’s browser cache if they were able to get the victim to download two separate files, a .url shortcut and a HTML file. Given the relative complexity of this attack, the severity of the issue was determined to be moderate.