CVE-2021-23982

MEDIUM

Firefox < 87.0 and Firefox ESR < 78.9 - Network Scanning via WebRTC Connections

Title source: llm
STIX 2.1

Description

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.

References (4)

Core 4
Core References
Issue Tracking, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1677046

Scores

CVSS v3 6.5
EPSS 0.0075
EPSS Percentile 49.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Details

CWE
CWE-326
Status published
Products (3)
mozilla/firefox < 87.0
mozilla/firefox_esr < 78.9
mozilla/thunderbird < 78.9
Published Mar 31, 2021
Tracked Since Feb 18, 2026