CVE-2021-23982
Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network’s hosts as well as services running on the user’s local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9. Date published : 2021-03-31 https://bugzilla.mozilla.org/show_bug.cgi?id=1677046